SettingsLast update:
| Time UTC | DSCOVR | ACE | ||||
|---|---|---|---|---|---|---|
| Solar Wind | GSM | Solar Wind | GSM | |||
| Proton Density | Bulk Speed | Bz | Proton Density | Bulk Speed | Bz | |
| 00:39 | - | - | - | - | - | - |
| 00:38 | - | - | - | - | - | - |
| 00:37 | 0.64 | 545.7 | 2.45 | - | - | - |
| 00:36 | 0.77 | 548.7 | 1.52 | - | - | - |
| 00:35 | 0.89 | 549.1 | 2.17 | - | - | - |
| 00:34 | 0.89 | 548.3 | 2.46 | - | - | - |
| 00:33 | 1.12 | 551.7 | 2.46 | - | - | - |
| 00:32 | 0.96 | 554.0 | 2.43 | - | - | - |
| 00:31 | 1.08 | 549.3 | 2.39 | - | - | - |
| 00:30 | 0.86 | 550.2 | 2.54 | - | - | - |
| 00:29 | 0.99 | 551.5 | 2.28 | - | - | - |
| 00:28 | 1.08 | 550.5 | 2.37 | 1.1 | 550.5 | 2.4 |
| 00:27 | 1.01 | 549.3 | 2.45 | 1.0 | 549.3 | 2.4 |
| 00:26 | 0.84 | 549.8 | 2.28 | 0.8 | 549.8 | 2.3 |
| 00:25 | 0.82 | 552.7 | 2.23 | 0.8 | 552.7 | 2.2 |
| 00:24 | 1.01 | 554.9 | 2.45 | 1.0 | 554.9 | 2.4 |
| 00:23 | 1.08 | 555.7 | 3.14 | 1.1 | 555.7 | 3.1 |
| 00:22 | 1.13 | 561.4 | 5.09 | 1.1 | 561.4 | 5.1 |
| 00:21 | 0.99 | 558.1 | 5.06 | 1.0 | 558.1 | 5.1 |
| 00:20 | 1.18 | 563.5 | 4.96 | 1.2 | 563.5 | 5.0 |
| 00:19 | 1.10 | 554.0 | 5.04 | 1.1 | 554.0 | 5.0 |
| 00:18 | 1.23 | 562.5 | 5.02 | 1.2 | 562.5 | 5.0 |
| 00:17 | 0.94 | 564.7 | 5.05 | 0.9 | 564.7 | 5.1 |
| 00:16 | 1.01 | 560.8 | 5.10 | 1.0 | 560.8 | 5.1 |
| 00:15 | 1.06 | 554.9 | 5.09 | 1.1 | 554.9 | 5.1 |
| 00:14 | 1.16 | 560.8 | 5.16 | 1.2 | 560.8 | 5.2 |
| 00:13 | 1.14 | 567.5 | 5.35 | 1.1 | 567.5 | 5.4 |
| 00:12 | 1.13 | 566.1 | 5.40 | 1.1 | 566.1 | 5.4 |
| 00:11 | 1.15 | 563.8 | 5.27 | 1.1 | 563.8 | 5.3 |
| 00:10 | 1.12 | 551.0 | 5.63 | 1.1 | 551.0 | 5.6 |
| 00:09 | 1.00 | 546.2 | 3.61 | 1.0 | 546.2 | 3.6 |
| 00:08 | 0.86 | 539.9 | 2.74 | 0.9 | 539.9 | 2.7 |
| 00:07 | 0.96 | 542.4 | 2.99 | 1.0 | 542.4 | 3.0 |
| 00:06 | 1.02 | 542.9 | 3.10 | 1.0 | 542.9 | 3.1 |
| 00:05 | 1.07 | 541.7 | 3.23 | 1.1 | 541.7 | 3.2 |
| 00:04 | 0.97 | 543.2 | 3.28 | 1.0 | 543.2 | 3.3 |
| 00:03 | 0.94 | 545.2 | 3.20 | 0.9 | 545.2 | 3.2 |
| 00:02 | 0.81 | 551.6 | 3.28 | 0.8 | 551.6 | 3.3 |
| 00:01 | 0.94 | 541.6 | 3.40 | 0.9 | 541.6 | 3.4 |
| 00:00 | 0.88 | 538.0 | 2.99 | 0.9 | 538.0 | 3.0 |
| 23:59 | 1.00 | 539.2 | 2.70 | 1.0 | 539.2 | 2.7 |
| 23:58 | 1.04 | 537.1 | 3.48 | 1.0 | 537.1 | 3.5 |
| 23:57 | 1.06 | 536.1 | 3.24 | 1.1 | 536.1 | 3.2 |
| 23:56 | 1.10 | 536.5 | 2.96 | 1.1 | 536.5 | 3.0 |
| 23:55 | 1.03 | 535.9 | 3.01 | 1.0 | 535.9 | 3.0 |
| 23:54 | 0.96 | 536.4 | 2.64 | 1.0 | 536.4 | 2.6 |
| 23:53 | 0.95 | 542.0 | 3.06 | 0.9 | 542.0 | 3.1 |
| 23:52 | 0.94 | 547.7 | 3.38 | 0.9 | 547.7 | 3.4 |
| 23:51 | 0.96 | 545.6 | 3.25 | 1.0 | 545.6 | 3.3 |
| 23:50 | 0.93 | 542.9 | 3.17 | 0.9 | 542.9 | 3.2 |
| 23:49 | 0.93 | 543.6 | 3.15 | 0.9 | 543.6 | 3.2 |
| 23:48 | 0.96 | 543.2 | 3.02 | 1.0 | 543.2 | 3.0 |
| 23:47 | 0.96 | 549.6 | 2.92 | 1.0 | 549.6 | 2.9 |
| 23:46 | 0.95 | 542.3 | 2.70 | 0.9 | 542.3 | 2.7 |
| 23:45 | 1.01 | 545.6 | 2.39 | 1.0 | 545.6 | 2.4 |
| 23:44 | 0.20 | 522.6 | 1.86 | 0.2 | 522.6 | 1.9 |
| 23:43 | 0.10 | 514.0 | -1.37 | 0.1 | 514.0 | -1.4 |
| 23:42 | 0.07 | 525.9 | -1.96 | 0.1 | 525.9 | -2.0 |
| 23:41 | 0.06 | 521.7 | -2.25 | 0.1 | 521.7 | -2.3 |
| 23:40 | 0.11 | 517.5 | -1.67 | 0.1 | 517.5 | -1.7 |
| 23:39 | 0.14 | 522.0 | -1.84 | 0.1 | 522.0 | -1.8 |
| 23:38 | 0.13 | 525.8 | -1.32 | 0.1 | 525.8 | -1.3 |
| 23:37 | 0.60 | 538.9 | 1.52 | 0.6 | 538.9 | 1.5 |
| 23:36 | 0.56 | 538.2 | 0.54 | 0.6 | 538.2 | 0.5 |
| 23:35 | 0.59 | 538.8 | 1.12 | 0.6 | 538.8 | 1.1 |
| 23:34 | 0.84 | 544.6 | 1.58 | 0.8 | 544.6 | 1.6 |
| 23:33 | 0.78 | 547.5 | 1.95 | 0.8 | 547.5 | 1.9 |
| 23:32 | 0.50 | 556.2 | 1.83 | 0.5 | 556.2 | 1.8 |
| 23:31 | 0.08 | 549.4 | -0.08 | 0.1 | 549.4 | -0.1 |
| 23:30 | 0.14 | 627.7 | -2.94 | 0.1 | 627.7 | -2.9 |
| 23:29 | 0.12 | 529.7 | -2.40 | 0.1 | 529.7 | -2.4 |
| 23:28 | 0.19 | 522.5 | -0.89 | 0.2 | 522.5 | -0.9 |
| 23:27 | 0.13 | 624.7 | -1.32 | 0.1 | 624.7 | -1.3 |
| 23:26 | 0.05 | 555.1 | -2.77 | 0.1 | 555.1 | -2.8 |
| 23:25 | 0.03 | 522.9 | -2.74 | 0.0 | 522.9 | -2.7 |
| 23:24 | 0.02 | 533.9 | - | 0.0 | 533.9 | - |
| 23:23 | 0.01 | 547.0 | -2.19 | 0.0 | 547.0 | -2.2 |
| 23:22 | 0.03 | 601.7 | -2.29 | 0.0 | 601.7 | -2.3 |
| 23:21 | 0.06 | 614.4 | -2.70 | 0.1 | 614.4 | -2.7 |
| 23:20 | 0.20 | 544.0 | -2.49 | 0.2 | 544.0 | -2.5 |
| 23:19 | 0.46 | 536.6 | 0.26 | 0.5 | 536.6 | 0.3 |
| 23:18 | 0.33 | 560.1 | 1.51 | 0.3 | 560.1 | 1.5 |
| 23:17 | 0.14 | 608.4 | 0.86 | 0.1 | 608.4 | 0.9 |
| 23:16 | 0.73 | 569.5 | -0.24 | 0.7 | 569.5 | -0.2 |
| 23:15 | 1.10 | 557.7 | 2.31 | 1.1 | 557.7 | 2.3 |
| 23:14 | 0.03 | 635.4 | 1.02 | 0.0 | 635.4 | 1.0 |
| 23:13 | 0.04 | 605.6 | -2.01 | 0.0 | 605.6 | -2.0 |
| 23:12 | 0.03 | 556.3 | -1.11 | 0.0 | 556.3 | -1.1 |
| 23:11 | 0.03 | 543.8 | -0.43 | 0.0 | 543.8 | -0.4 |
| 23:10 | 0.04 | 539.8 | -0.57 | 0.0 | 539.8 | -0.6 |
| 23:09 | 0.07 | 527.6 | -0.09 | 0.1 | 527.6 | -0.1 |
| 23:08 | 0.13 | 541.2 | 0.15 | 0.1 | 541.2 | 0.2 |
| 23:07 | 0.21 | 546.2 | 0.39 | 0.2 | 546.2 | 0.4 |
| 23:06 | 0.19 | 536.5 | 0.81 | 0.2 | 536.5 | 0.8 |
| 23:05 | 0.13 | 533.2 | 1.09 | 0.1 | 533.2 | 1.1 |
| 23:04 | 0.29 | 566.9 | 0.77 | 0.3 | 566.9 | 0.8 |
| 23:03 | 0.26 | 562.8 | 1.08 | 0.3 | 562.8 | 1.1 |
| 23:02 | 1.92 | 546.9 | 1.70 | 1.9 | 546.9 | 1.7 |
| 23:01 | 7.75 | 529.0 | 2.08 | 7.7 | 529.0 | 2.1 |
| 23:00 | 0.44 | 541.3 | 2.03 | 0.4 | 541.3 | 2.0 |
| 22:59 | 1.69 | 575.3 | 3.98 | 1.7 | 575.3 | 4.0 |
| 22:58 | 1.28 | 594.3 | 3.81 | 1.3 | 594.3 | 3.8 |
| 22:57 | 1.17 | 595.9 | 4.11 | 1.2 | 595.9 | 4.1 |
| 22:56 | 0.65 | 554.8 | 3.83 | 0.7 | 554.8 | 3.8 |
| 22:55 | 0.90 | 574.8 | 4.47 | 0.9 | 574.8 | 4.5 |
| 22:54 | 0.97 | 583.6 | 4.45 | 1.0 | 583.6 | 4.4 |
| 22:53 | 1.28 | 587.8 | 4.19 | 1.3 | 587.8 | 4.2 |
| 22:52 | 1.12 | 591.1 | 4.43 | 1.1 | 591.1 | 4.4 |
| 22:51 | 0.96 | 578.4 | 5.44 | 1.0 | 578.4 | 5.4 |
| 22:50 | 1.09 | 570.8 | 5.09 | 1.1 | 570.8 | 5.1 |
| 22:49 | 0.87 | 565.7 | 2.73 | 0.9 | 565.7 | 2.7 |
| 22:48 | 0.38 | 546.4 | 3.35 | 0.4 | 546.4 | 3.3 |
| 22:47 | 0.36 | 543.0 | 3.73 | 0.4 | 543.0 | 3.7 |
| 22:46 | 0.67 | 561.2 | 1.80 | 0.7 | 561.2 | 1.8 |
| 22:45 | 1.71 | 575.6 | 3.95 | 1.7 | 575.6 | 3.9 |
| 22:44 | 0.59 | 550.3 | 4.52 | 0.6 | 550.3 | 4.5 |
| 22:43 | 0.89 | 541.4 | 3.94 | 0.9 | 541.4 | 3.9 |
| 22:42 | 0.50 | 558.2 | 3.27 | 0.5 | 558.2 | 3.3 |
| 22:41 | 0.17 | 541.3 | 0.96 | 0.2 | 541.3 | 1.0 |
| 22:40 | 0.34 | 551.3 | 1.06 | 0.3 | 551.3 | 1.1 |
Built 2025-11-15 00:40 from source
| Solar wind parameters of the latest hour by NOAA | |||
|---|---|---|---|
| parameter | min | max | mean |
| IMF Bz [nT] | -2.9 | 5.6 | 2.5 |
| velocity [km/s] | 514.0 | 627.7 | 545.8 |
| density [cm-3] | 0.1 | 1.2 | 0.8 |
| Geomagnetic activity (RX [nT]) | ||
|---|---|---|
| site | latest hour | next hour (RXmin, RXmax) |
| Kevo (KEV) | 28 | 7 | 281 |
| Maasi (MAS) | 29 | 6 | 281 |
| Kilpisjärvi (KIL) | 31 | 7 | 311 |
| Ivalo (IVA) | 22 | 5 | 256 |
| Muonio (MUO) | 21 | 4 | 251 |
| Sodankylä (SOD) | 18 | 5 | 242 |
| Pello (PEL) | 16 | 4 | 222 |
| Oulujärvi (OUJ) | 10 | 3 | 72 |
| Mekrijärvi (MEK) | 5 | 2 | 25 |
| Hankasalmi (HAN) | 5 | 3 | 35 |
| Nurmijärvi (NUR) | 5 | 3 | 30 |
| Tartu (TAR) | 4 | 2 | 22 |
| low | increased | moderate | high | very high |
Short explanation of the method
AurorasNow! (Finnish Meteorological Institute)Built 2025-11-15 00:32 from source
Issue Time: 2025-11-14 23:38 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025-11-14 09:20 UTC
Maximum Time: 2025-11-14 09:50 UTC
End Time: 2025-11-14 13:25 UTC
Maximum 10MeV Flux: 16 pfu
NOAA Scale: S1 - Minor
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025-11-14 09:20 UTC
Maximum Time: 2025-11-14 09:50 UTC
End Time: 2025-11-14 13:25 UTC
Maximum 10MeV Flux: 16 pfu
NOAA Scale: S1 - Minor
Issue Time: 2025-11-14 17:50 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day
Nov 15: None (Below G1) Nov 16: G1 (Minor) Nov 17: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day
Nov 15: None (Below G1) Nov 16: G1 (Minor) Nov 17: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-14 12:09 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2025-11-14 08:22 UTC
Maximum Time: 2025-11-14 08:25 UTC
End Time: 2025-11-14 08:41 UTC
Duration: 19 minutes
Peak Flux: 1100 sfu
Latest Penticton Noon Flux: 156 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.
SUMMARY: 10cm Radio Burst
Begin Time: 2025-11-14 08:22 UTC
Maximum Time: 2025-11-14 08:25 UTC
End Time: 2025-11-14 08:41 UTC
Duration: 19 minutes
Peak Flux: 1100 sfu
Latest Penticton Noon Flux: 156 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.
Issue Time: 2025-11-14 11:45 UTC
ALERT: Type IV Radio Emission
Begin Time: 2025-11-14 08:37 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.
ALERT: Type IV Radio Emission
Begin Time: 2025-11-14 08:37 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.
Issue Time: 2025-11-14 09:37 UTC
ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025-11-14 09:20 UTC
NOAA Scale: S1 - Minor
ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025-11-14 09:20 UTC
NOAA Scale: S1 - Minor
Issue Time: 2025-11-14 09:17 UTC
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2025-11-14 09:17 UTC
Valid To: 2025-11-14 23:59 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2025-11-14 09:17 UTC
Valid To: 2025-11-14 23:59 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
Issue Time: 2025-11-14 09:08 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2025-11-14 07:44 UTC
Maximum Time: 2025-11-14 08:30 UTC
End Time: 2025-11-14 08:40 UTC
X-ray Class: X4
Optical Class: na
Location: N24W68
NOAA Scale: R3 - Strong
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.
SUMMARY: X-ray Event exceeded X1
Begin Time: 2025-11-14 07:44 UTC
Maximum Time: 2025-11-14 08:30 UTC
End Time: 2025-11-14 08:40 UTC
X-ray Class: X4
Optical Class: na
Location: N24W68
NOAA Scale: R3 - Strong
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.
Issue Time: 2025-11-14 08:41 UTC
ALERT: Type II Radio Emission
Begin Time: 2025-11-14 08:13 UTC
Estimated Velocity: 1525 km/s
Comment: From San Vito
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.
ALERT: Type II Radio Emission
Begin Time: 2025-11-14 08:13 UTC
Estimated Velocity: 1525 km/s
Comment: From San Vito
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.
Issue Time: 2025-11-14 08:26 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025-11-14 08:23 UTC
NOAA Scale: R2 - Moderate
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025-11-14 08:23 UTC
NOAA Scale: R2 - Moderate
Issue Time: 2025-11-13 21:11 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025-11-10 10:30 UTC
Maximum Time: 2025-11-12 02:15 UTC
End Time: 2025-11-13 21:00 UTC
Maximum 10MeV Flux: 1456 pfu
NOAA Scale: S3 - Strong
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025-11-10 10:30 UTC
Maximum Time: 2025-11-12 02:15 UTC
End Time: 2025-11-13 21:00 UTC
Maximum 10MeV Flux: 1456 pfu
NOAA Scale: S3 - Strong
Issue Time: 2025-11-13 20:58 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5148
Valid From: 2025-11-11 22:30 UTC
Now Valid Until: 2025-11-14 12:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5148
Valid From: 2025-11-11 22:30 UTC
Now Valid Until: 2025-11-14 12:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2025-11-13 20:56 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2137
Valid From: 2025-11-11 23:43 UTC
Now Valid Until: 2025-11-14 09:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2137
Valid From: 2025-11-11 23:43 UTC
Now Valid Until: 2025-11-14 09:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-13 20:56 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 625
Valid From: 2025-11-11 23:44 UTC
Now Valid Until: 2025-11-14 09:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 625
Valid From: 2025-11-11 23:44 UTC
Now Valid Until: 2025-11-14 09:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-13 15:38 UTC
WATCH: Geomagnetic Storm Category G3 Predicted
Highest Storm Level Predicted by Day
Nov 13: G3 (Strong) Nov 14: G1 (Minor) Nov 15: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: Downgrading watch to G3 (Strong) for the remainder of 13 Nov as geomagnetic activity gradually subsides.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
WATCH: Geomagnetic Storm Category G3 Predicted
Highest Storm Level Predicted by Day
Nov 13: G3 (Strong) Nov 14: G1 (Minor) Nov 15: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: Downgrading watch to G3 (Strong) for the remainder of 13 Nov as geomagnetic activity gradually subsides.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2025-11-13 14:47 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 624
Valid From: 2025-11-11 23:44 UTC
Now Valid Until: 2025-11-13 21:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 624
Valid From: 2025-11-11 23:44 UTC
Now Valid Until: 2025-11-13 21:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-13 14:36 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-13 14:35 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-13 14:35 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-13 11:45 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 614
Valid From: 2025-11-10 10:30 UTC
Now Valid Until: 2025-11-13 21:00 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 614
Valid From: 2025-11-10 10:30 UTC
Now Valid Until: 2025-11-13 21:00 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
Issue Time: 2025-11-13 07:32 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-13 07:23 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-13 07:23 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-13 07:32 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2136
Valid From: 2025-11-11 23:43 UTC
Now Valid Until: 2025-11-13 21:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2136
Valid From: 2025-11-11 23:43 UTC
Now Valid Until: 2025-11-13 21:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-13 07:32 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 623
Valid From: 2025-11-11 23:44 UTC
Now Valid Until: 2025-11-13 15:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 623
Valid From: 2025-11-11 23:44 UTC
Now Valid Until: 2025-11-13 15:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-13 07:04 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-13 06:47 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-13 06:47 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-13 06:03 UTC
SUMMARY: Proton Event 100MeV Integral Flux exceeded 1pfu
Begin Time: 2025-11-11 11:00 UTC
Maximum Time: 2025-11-12 01:50 UTC
End Time: 2025-11-12 09:25 UTC
Maximum 100MeV Flux: 37 pfu
SUMMARY: Proton Event 100MeV Integral Flux exceeded 1pfu
Begin Time: 2025-11-11 11:00 UTC
Maximum Time: 2025-11-12 01:50 UTC
End Time: 2025-11-12 09:25 UTC
Maximum 100MeV Flux: 37 pfu
Issue Time: 2025-11-13 06:00 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2025-11-11 12:25 UTC
Maximum Time: 2025-11-12 02:15 UTC
End Time: 2025-11-13 02:05 UTC
Maximum 10MeV Flux: 1460 pfu
NOAA Scale: S3 - Strong
SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2025-11-11 12:25 UTC
Maximum Time: 2025-11-12 02:15 UTC
End Time: 2025-11-13 02:05 UTC
Maximum 10MeV Flux: 1460 pfu
NOAA Scale: S3 - Strong
Issue Time: 2025-11-13 05:23 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-11-13 05:18 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-11-13 05:18 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2025-11-13 04:07 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-13 04:04 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-13 04:04 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-13 03:35 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-13 03:30 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-13 03:30 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-13 01:53 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-11-13 01:50 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-11-13 01:50 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2025-11-13 01:21 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-13 01:16 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-13 01:16 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-13 00:30 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-13 00:25 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-13 00:25 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-13 00:03 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 23:59 UTC
Synoptic Period: 2100-0000 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 23:59 UTC
Synoptic Period: 2100-0000 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-12 23:56 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 613
Valid From: 2025-11-10 10:30 UTC
Now Valid Until: 2025-11-13 12:00 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 613
Valid From: 2025-11-10 10:30 UTC
Now Valid Until: 2025-11-13 12:00 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
Issue Time: 2025-11-12 23:54 UTC
EXTENDED WARNING: Proton 100MeV Integral Flux above 1pfu expected
Extension to Serial Number: 119
Valid From: 2025-11-11 10:28 UTC
Now Valid Until: 2025-11-13 06:00 UTC
Warning Condition: Persistence
EXTENDED WARNING: Proton 100MeV Integral Flux above 1pfu expected
Extension to Serial Number: 119
Valid From: 2025-11-11 10:28 UTC
Now Valid Until: 2025-11-13 06:00 UTC
Warning Condition: Persistence
Issue Time: 2025-11-12 23:38 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 1000pfu
Begin Time: 2025-11-12 01:45 UTC
Maximum Time: 2025-11-12 02:15 UTC
End Time: 2025-11-12 03:10 UTC
Maximum 10MeV Flux: 1460 pfu
NOAA Scale: S3 - Strong
Comment: Final CME shock appears to have arrived at L1 at approximately 12/1853 UTC. The corresponding proton enhancement in GEO reached 819 pfu at 12/1915 UTC. S3 levels are no longer expected.
WC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 1000pfu
Begin Time: 2025-11-12 01:45 UTC
Maximum Time: 2025-11-12 02:15 UTC
End Time: 2025-11-12 03:10 UTC
Maximum 10MeV Flux: 1460 pfu
NOAA Scale: S3 - Strong
Comment: Final CME shock appears to have arrived at L1 at approximately 12/1853 UTC. The corresponding proton enhancement in GEO reached 819 pfu at 12/1915 UTC. S3 levels are no longer expected.
WC
Issue Time: 2025-11-12 20:54 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 622
Valid From: 2025-11-11 23:44 UTC
Now Valid Until: 2025-11-13 09:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 622
Valid From: 2025-11-11 23:44 UTC
Now Valid Until: 2025-11-13 09:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-12 20:54 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 137
Valid From: 2025-11-12 00:20 UTC
Now Valid Until: 2025-11-13 09:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 137
Valid From: 2025-11-12 00:20 UTC
Now Valid Until: 2025-11-13 09:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2025-11-12 20:52 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-12 20:51 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-12 20:51 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-12 20:11 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 20:09 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 20:09 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-12 19:38 UTC
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2025-11-12 19:17 UTC
Deviation: 33 nT
Station: FRD
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2025-11-12 19:17 UTC
Deviation: 33 nT
Station: FRD
Issue Time: 2025-11-12 19:04 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2025-11-12 19:15 UTC
Valid To: 2025-11-12 19:45 UTC
IP Shock Passage Observed: 2025-11-12 18:53 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2025-11-12 19:15 UTC
Valid To: 2025-11-12 19:45 UTC
IP Shock Passage Observed: 2025-11-12 18:53 UTC
Issue Time: 2025-11-12 18:05 UTC
WATCH: Geomagnetic Storm Category G4 or Greater Predicted
Highest Storm Level Predicted by Day
Nov 13: G4 (Severe) Nov 14: G1 (Minor) Nov 15: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
WATCH: Geomagnetic Storm Category G4 or Greater Predicted
Highest Storm Level Predicted by Day
Nov 13: G4 (Severe) Nov 14: G1 (Minor) Nov 15: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
Issue Time: 2025-11-12 17:36 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 17:19 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 17:19 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-12 12:51 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 12:40 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 12:40 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-12 11:51 UTC
EXTENDED WARNING: Proton 100MeV Integral Flux above 1pfu expected
Extension to Serial Number: 118
Valid From: 2025-11-11 10:28 UTC
Now Valid Until: 2025-11-12 23:59 UTC
Warning Condition: Persistence
EXTENDED WARNING: Proton 100MeV Integral Flux above 1pfu expected
Extension to Serial Number: 118
Valid From: 2025-11-11 10:28 UTC
Now Valid Until: 2025-11-12 23:59 UTC
Warning Condition: Persistence
Issue Time: 2025-11-12 10:38 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-11-12 10:33 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-11-12 10:33 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2025-11-12 09:35 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-12 09:31 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-12 09:31 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-12 09:19 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 09:12 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 09:12 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-12 08:59 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-11-12 08:59 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-11-12 08:59 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2025-11-12 08:37 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 136
Valid From: 2025-11-12 00:20 UTC
Now Valid Until: 2025-11-12 21:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 136
Valid From: 2025-11-12 00:20 UTC
Now Valid Until: 2025-11-12 21:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2025-11-12 08:37 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2135
Valid From: 2025-11-11 23:43 UTC
Now Valid Until: 2025-11-13 12:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2135
Valid From: 2025-11-11 23:43 UTC
Now Valid Until: 2025-11-13 12:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-12 08:37 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 621
Valid From: 2025-11-11 23:44 UTC
Now Valid Until: 2025-11-12 23:59 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 621
Valid From: 2025-11-11 23:44 UTC
Now Valid Until: 2025-11-12 23:59 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-12 08:37 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-12 08:31 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-12 08:31 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-12 08:37 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5147
Valid From: 2025-11-11 22:30 UTC
Now Valid Until: 2025-11-13 23:59 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5147
Valid From: 2025-11-11 22:30 UTC
Now Valid Until: 2025-11-13 23:59 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2025-11-12 06:59 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 06:55 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 06:55 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-12 05:02 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3558
Begin Time: 2025-11-10 13:25 UTC
Yesterday Maximum 2MeV Flux: 10891 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3558
Begin Time: 2025-11-10 13:25 UTC
Yesterday Maximum 2MeV Flux: 10891 pfu
Issue Time: 2025-11-12 03:46 UTC
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2025-11-12 03:45 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2025-11-12 03:45 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
Issue Time: 2025-11-12 03:14 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-11-12 03:10 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-11-12 03:10 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2025-11-12 03:11 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-12 03:06 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-12 03:06 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-12 03:10 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 03:05 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 03:05 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-12 01:55 UTC
ALERT: Proton Event 10MeV Integral Flux exceeded 1000pfu
Begin Time: 2025-11-12 01:45 UTC
NOAA Scale: S3 - Strong
Spacecraft - Single-event upsets to satellite operations, noise in imaging systems, and slight reduction of efficiency in solar panels are likely.
Radio - Degraded or episodically blacked-out polar HF (high frequency) radio propagation.
ALERT: Proton Event 10MeV Integral Flux exceeded 1000pfu
Begin Time: 2025-11-12 01:45 UTC
NOAA Scale: S3 - Strong
Spacecraft - Single-event upsets to satellite operations, noise in imaging systems, and slight reduction of efficiency in solar panels are likely.
Radio - Degraded or episodically blacked-out polar HF (high frequency) radio propagation.
Issue Time: 2025-11-12 01:22 UTC
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2025-11-12 01:21 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2025-11-12 01:21 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
Issue Time: 2025-11-12 00:45 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-11-12 00:40 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-11-12 00:40 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2025-11-12 00:30 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-12 00:24 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-11-12 00:24 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-12 00:21 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 00:12 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-11-12 00:12 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2025-11-12 00:20 UTC
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2025-11-12 00:20 UTC
Valid To: 2025-11-12 09:00 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2025-11-12 00:20 UTC
Valid To: 2025-11-12 09:00 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2025-11-12 00:19 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025-11-12 00:11 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025-11-12 00:11 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2025-11-11 23:45 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025-11-11 23:44 UTC
Valid To: 2025-11-12 12:00 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025-11-11 23:44 UTC
Valid To: 2025-11-12 12:00 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2025-11-11 23:45 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025-11-11 23:43 UTC
Valid To: 2025-11-12 23:59 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025-11-11 23:43 UTC
Valid To: 2025-11-12 23:59 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Built 2025-11-14 23:40 from source
