SettingsLast update:
| Time UTC | DSCOVR | ACE | ||||
|---|---|---|---|---|---|---|
| Solar Wind | GSM | Solar Wind | GSM | |||
| Proton Density | Bulk Speed | Bz | Proton Density | Bulk Speed | Bz | |
| 08:18 | - | - | - | - | - | - |
| 08:17 | - | - | - | - | - | - |
| 08:16 | 7.95 | 682.7 | -5.06 | - | - | - |
| 08:15 | 7.95 | 682.7 | -5.30 | - | - | - |
| 08:14 | - | - | -5.13 | - | - | - |
| 08:13 | - | - | -4.87 | - | - | - |
| 08:12 | 4.61 | 668.7 | -4.36 | - | - | - |
| 08:11 | 2.35 | 668.2 | -4.25 | - | - | - |
| 08:10 | 1.13 | 676.5 | -5.12 | - | - | - |
| 08:09 | 6.07 | 608.1 | -4.99 | - | - | - |
| 08:08 | 5.95 | 595.8 | -4.42 | 5.9 | 595.8 | -4.4 |
| 08:07 | 0.72 | 647.4 | -3.70 | 0.7 | 647.4 | -3.7 |
| 08:06 | 0.60 | 635.0 | -3.98 | 0.6 | 635.0 | -4.0 |
| 08:05 | - | - | -3.38 | - | - | -3.4 |
| 08:04 | 0.59 | 614.4 | -3.57 | 0.6 | 614.4 | -3.6 |
| 08:03 | 2.48 | 624.9 | -3.24 | 2.5 | 624.9 | -3.2 |
| 08:02 | 14.73 | 693.2 | -3.08 | 14.7 | 693.2 | -3.1 |
| 08:01 | - | - | -3.44 | - | - | -3.4 |
| 08:00 | 0.66 | 617.1 | -4.63 | 0.7 | 617.1 | -4.6 |
| 07:59 | 4.70 | 632.9 | -4.65 | 4.7 | 632.9 | -4.7 |
| 07:58 | 12.14 | 675.5 | -1.05 | 12.1 | 675.5 | -1.0 |
| 07:57 | 16.05 | 654.8 | -0.75 | 16.1 | 654.8 | -0.7 |
| 07:56 | 4.64 | 677.2 | -0.31 | 4.6 | 677.2 | -0.3 |
| 07:55 | 0.12 | 559.6 | 0.82 | 0.1 | 559.6 | 0.8 |
| 07:54 | 5.30 | 444.4 | 1.11 | 5.3 | 444.4 | 1.1 |
| 07:53 | 4.80 | 630.6 | 0.77 | 4.8 | 630.6 | 0.8 |
| 07:52 | 2.39 | 627.2 | -0.63 | 2.4 | 627.2 | -0.6 |
| 07:51 | 1.49 | 692.9 | -1.85 | 1.5 | 692.9 | -1.9 |
| 07:50 | 2.37 | 741.1 | -1.31 | 2.4 | 741.1 | -1.3 |
| 07:49 | 1.63 | 688.5 | -0.78 | 1.6 | 688.5 | -0.8 |
| 07:48 | 5.95 | 773.5 | -1.09 | 6.0 | 773.5 | -1.1 |
| 07:47 | 0.05 | 665.5 | -0.32 | 0.1 | 665.5 | -0.3 |
| 07:46 | 0.05 | 666.2 | 1.02 | 0.1 | 666.2 | 1.0 |
| 07:45 | 0.05 | 676.0 | 2.79 | 0.1 | 676.0 | 2.8 |
| 07:44 | 0.03 | 633.3 | 2.81 | 0.0 | 633.3 | 2.8 |
| 07:43 | 0.06 | 653.4 | 0.25 | 0.1 | 653.4 | 0.3 |
| 07:42 | 0.22 | 757.3 | 1.51 | 0.2 | 757.3 | 1.5 |
| 07:41 | 0.12 | 683.6 | 2.54 | 0.1 | 683.6 | 2.5 |
| 07:40 | 0.09 | 661.2 | 1.96 | 0.1 | 661.2 | 2.0 |
| 07:39 | - | - | 1.28 | - | - | 1.3 |
| 07:38 | - | - | 0.98 | - | - | 1.0 |
| 07:37 | 0.11 | 701.7 | 1.01 | 0.1 | 701.7 | 1.0 |
| 07:36 | 0.11 | 701.7 | 1.05 | 0.1 | 701.7 | 1.1 |
| 07:35 | 0.09 | 689.0 | 0.71 | 0.1 | 689.0 | 0.7 |
| 07:34 | 0.14 | 686.7 | 1.17 | 0.1 | 686.7 | 1.2 |
| 07:33 | 0.19 | 685.3 | 0.74 | 0.2 | 685.3 | 0.7 |
| 07:32 | 0.58 | 677.6 | 0.98 | 0.6 | 677.6 | 1.0 |
| 07:31 | 2.27 | 612.8 | 0.87 | 2.3 | 612.8 | 0.9 |
| 07:30 | 0.48 | 618.5 | -0.46 | 0.5 | 618.5 | -0.5 |
| 07:29 | 0.43 | 618.3 | -3.16 | 0.4 | 618.3 | -3.2 |
| 07:28 | 1.60 | 665.7 | -2.59 | 1.6 | 665.7 | -2.6 |
| 07:27 | 0.57 | 623.3 | -2.55 | 0.6 | 623.3 | -2.6 |
| 07:26 | 1.91 | 735.8 | -2.75 | 1.9 | 735.8 | -2.8 |
| 07:25 | 1.16 | 678.6 | -2.98 | 1.2 | 678.6 | -3.0 |
| 07:24 | 2.05 | 598.1 | -2.73 | 2.0 | 598.1 | -2.7 |
| 07:23 | 2.94 | 615.9 | -2.74 | 2.9 | 615.9 | -2.7 |
| 07:22 | 3.16 | 614.2 | -2.78 | 3.2 | 614.2 | -2.8 |
| 07:21 | 4.93 | 587.2 | -2.54 | 4.9 | 587.2 | -2.5 |
| 07:20 | 4.63 | 602.0 | -2.67 | 4.6 | 602.0 | -2.7 |
| 07:19 | 1.89 | 655.7 | -2.87 | 1.9 | 655.7 | -2.9 |
| 07:18 | 3.22 | 653.3 | -2.32 | 3.2 | 653.3 | -2.3 |
| 07:17 | 5.94 | 586.6 | -2.53 | 5.9 | 586.6 | -2.5 |
| 07:16 | 2.59 | 612.1 | -2.81 | 2.6 | 612.1 | -2.8 |
| 07:15 | 7.51 | 589.4 | -2.92 | 7.5 | 589.4 | -2.9 |
| 07:14 | 0.82 | 589.4 | -2.95 | 0.8 | 589.4 | -3.0 |
| 07:13 | 0.90 | 604.3 | -3.16 | 0.9 | 604.3 | -3.2 |
| 07:12 | 23.03 | 674.8 | -3.60 | 23.0 | 674.8 | -3.6 |
| 07:11 | 5.03 | 664.4 | -3.72 | 5.0 | 664.4 | -3.7 |
| 07:10 | 1.51 | 628.9 | -3.75 | 1.5 | 628.9 | -3.8 |
| 07:09 | 7.47 | 513.9 | -3.73 | 7.5 | 513.9 | -3.7 |
| 07:08 | 2.92 | 583.4 | -3.74 | 2.9 | 583.4 | -3.7 |
| 07:07 | 0.68 | 618.7 | -3.94 | 0.7 | 618.7 | -3.9 |
| 07:06 | 0.83 | 589.7 | -1.74 | 0.8 | 589.7 | -1.7 |
| 07:05 | 1.32 | 561.1 | -1.82 | 1.3 | 561.1 | -1.8 |
| 07:04 | 1.48 | 558.4 | -2.75 | 1.5 | 558.4 | -2.8 |
| 07:03 | 1.02 | 590.3 | -2.21 | 1.0 | 590.3 | -2.2 |
| 07:02 | 0.84 | 600.9 | -1.72 | 0.8 | 600.9 | -1.7 |
| 07:01 | 1.06 | 611.4 | -2.87 | 1.1 | 611.4 | -2.9 |
| 07:00 | 1.24 | 628.8 | -2.95 | 1.2 | 628.8 | -2.9 |
| 06:59 | 0.99 | 609.6 | -3.50 | 1.0 | 609.6 | -3.5 |
| 06:58 | 1.22 | 608.0 | -3.18 | 1.2 | 608.0 | -3.2 |
| 06:57 | 1.26 | 613.6 | -2.81 | 1.3 | 613.6 | -2.8 |
| 06:56 | 2.43 | 607.5 | -2.70 | 2.4 | 607.5 | -2.7 |
| 06:55 | 2.43 | 607.5 | -2.59 | 2.4 | 607.5 | -2.6 |
| 06:54 | 6.63 | 610.9 | -2.73 | 6.6 | 610.9 | -2.7 |
| 06:53 | 6.92 | 616.1 | -2.25 | 6.9 | 616.1 | -2.3 |
| 06:52 | 6.99 | 617.4 | -2.52 | 7.0 | 617.4 | -2.5 |
| 06:51 | 1.07 | 620.7 | -2.86 | 1.1 | 620.7 | -2.9 |
| 06:50 | 1.02 | 603.8 | -2.96 | 1.0 | 603.8 | -3.0 |
| 06:49 | 7.45 | 551.3 | -2.76 | 7.5 | 551.3 | -2.8 |
| 06:48 | 8.73 | 547.4 | -2.70 | 8.7 | 547.4 | -2.7 |
| 06:47 | 2.57 | 589.0 | -3.07 | 2.6 | 589.0 | -3.1 |
| 06:46 | 0.93 | 604.8 | -3.21 | 0.9 | 604.8 | -3.2 |
| 06:45 | 0.98 | 612.5 | -3.34 | 1.0 | 612.5 | -3.3 |
| 06:44 | 0.69 | 590.3 | -3.62 | 0.7 | 590.3 | -3.6 |
| 06:43 | 1.09 | 604.1 | -3.23 | 1.1 | 604.1 | -3.2 |
| 06:42 | 1.72 | 649.5 | -3.20 | 1.7 | 649.5 | -3.2 |
| 06:41 | 1.98 | 662.9 | -3.19 | 2.0 | 662.9 | -3.2 |
| 06:40 | 4.58 | 588.5 | -2.69 | 4.6 | 588.5 | -2.7 |
| 06:39 | 4.38 | 606.6 | -2.16 | 4.4 | 606.6 | -2.2 |
| 06:38 | 1.80 | 595.0 | -2.21 | 1.8 | 595.0 | -2.2 |
| 06:37 | 7.76 | 543.5 | -2.68 | 7.8 | 543.5 | -2.7 |
| 06:36 | 24.18 | 559.7 | -2.41 | 24.2 | 559.7 | -2.4 |
| 06:35 | 10.25 | 602.6 | -2.88 | 10.2 | 602.6 | -2.9 |
| 06:34 | 0.59 | 618.8 | -2.75 | 0.6 | 618.8 | -2.8 |
| 06:33 | - | - | -2.60 | - | - | -2.6 |
| 06:32 | - | - | -3.67 | - | - | -3.7 |
| 06:31 | 0.66 | 622.6 | -3.98 | 0.7 | 622.6 | -4.0 |
| 06:30 | - | - | -3.74 | - | - | -3.7 |
| 06:29 | - | - | -3.31 | - | - | -3.3 |
| 06:28 | 0.12 | 600.9 | -3.78 | 0.1 | 600.9 | -3.8 |
| 06:27 | 0.18 | 599.5 | -2.56 | 0.2 | 599.5 | -2.6 |
| 06:26 | 0.57 | 590.4 | -1.16 | 0.6 | 590.4 | -1.2 |
| 06:25 | - | - | -2.14 | - | - | -2.1 |
| 06:24 | - | - | -2.65 | - | - | -2.6 |
| 06:23 | 0.96 | 627.3 | -2.55 | 1.0 | 627.3 | -2.5 |
| 06:22 | 11.60 | 579.7 | -2.82 | 11.6 | 579.7 | -2.8 |
| 06:21 | 11.81 | 581.8 | -3.90 | 11.8 | 581.8 | -3.9 |
| 06:20 | 4.23 | 606.3 | -3.51 | 4.2 | 606.3 | -3.5 |
| 06:19 | 0.95 | 592.9 | -3.18 | 0.9 | 592.9 | -3.2 |
Built 2025-10-04 08:19 from source
| Solar wind parameters of the latest hour by NOAA | |||
|---|---|---|---|
| parameter | min | max | mean |
| IMF Bz [nT] | -5.1 | 2.8 | -1.5 |
| velocity [km/s] | 444.4 | 773.5 | 647.7 |
| density [cm-3] | 0.0 | 23.0 | 3.1 |
| Geomagnetic activity (RX [nT]) | ||
|---|---|---|
| site | latest hour | next hour (RXmin, RXmax) |
| Kevo (KEV) | 138 | 21 | 153 |
| Maasi (MAS) | 131 | 22 | 152 |
| Kilpisjärvi (KIL) | - | 21 | 166 |
| Ivalo (IVA) | - | 17 | 155 |
| Muonio (MUO) | - | 17 | 138 |
| Sodankylä (SOD) | 83 | 15 | 120 |
| Pello (PEL) | - | 14 | 114 |
| Oulujärvi (OUJ) | 64 | 10 | 73 |
| Mekrijärvi (MEK) | 44 | 7 | 43 |
| Hankasalmi (HAN) | 39 | 8 | 43 |
| Nurmijärvi (NUR) | 45 | 9 | 46 |
| Tartu (TAR) | 38 | 7 | 34 |
| low | increased | moderate | high | very high |
Short explanation of the method
AurorasNow! (Finnish Meteorological Institute)Built 2025-10-04 08:17 from source
Issue Time: 2025-10-04 05:19 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3535
Begin Time: 2025-10-01 13:25 UTC
Yesterday Maximum 2MeV Flux: 7331 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3535
Begin Time: 2025-10-01 13:25 UTC
Yesterday Maximum 2MeV Flux: 7331 pfu
Issue Time: 2025-10-03 15:07 UTC
ALERT: Type II Radio Emission
Begin Time: 2025-10-03 14:51 UTC
Estimated Velocity: 416 km/s
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: 2025-10-03 14:51 UTC
Estimated Velocity: 416 km/s
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: 2025-10-03 14:43 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2115
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-03 23:59 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: 2115
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-03 23:59 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: 2025-10-03 14:43 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5095
Valid From: 2025-09-29 06:45 UTC
Now Valid Until: 2025-10-04 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: 5095
Valid From: 2025-09-29 06:45 UTC
Now Valid Until: 2025-10-04 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: 2025-10-03 12:15 UTC
ALERT: Type IV Radio Emission
Begin Time: 2025-10-03 11:12 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: 2025-10-03 11:12 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: 2025-10-03 12:14 UTC
ALERT: Type II Radio Emission
Begin Time: 2025-10-03 11:01 UTC
Estimated Velocity: 1618 km/s
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: 2025-10-03 11:01 UTC
Estimated Velocity: 1618 km/s
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: 2025-10-03 08:43 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-10-03 08:36 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: 2025-10-03 08:36 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: 2025-10-03 07:16 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2114
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-03 15:00 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: 2114
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-03 15:00 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: 2025-10-03 05:00 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3534
Begin Time: 2025-10-01 13:25 UTC
Yesterday Maximum 2MeV Flux: 3609 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3534
Begin Time: 2025-10-01 13:25 UTC
Yesterday Maximum 2MeV Flux: 3609 pfu
Issue Time: 2025-10-03 04:17 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-10-03 04:07 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: 2025-10-03 04:07 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: 2025-10-02 23:07 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2113
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-03 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: 2113
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-03 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: 2025-10-02 19:53 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5094
Valid From: 2025-09-29 06:45 UTC
Now Valid Until: 2025-10-04 00:00 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: 5094
Valid From: 2025-09-29 06:45 UTC
Now Valid Until: 2025-10-04 00:00 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: 2025-10-02 19:30 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-10-02 19:22 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: 2025-10-02 19:22 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: 2025-10-02 19:16 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2112
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-03 00:00 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: 2112
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-03 00:00 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: 2025-10-02 11:40 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day
Oct 02: G2 (Moderate) Oct 03: G1 (Minor) Oct 04: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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.
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day
Oct 02: G2 (Moderate) Oct 03: G1 (Minor) Oct 04: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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: 2025-10-02 10:45 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-10-02 10:38 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: 2025-10-02 10:38 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: 2025-10-02 10:37 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 612
Valid From: 2025-09-30 02:52 UTC
Now Valid Until: 2025-10-02 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: 612
Valid From: 2025-09-30 02:52 UTC
Now Valid Until: 2025-10-02 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: 2025-10-02 09:09 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-10-02 08:59 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: 2025-10-02 08:59 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: 2025-10-02 06:02 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-10-02 05:59 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: 2025-10-02 05:59 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: 2025-10-02 04:59 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3533
Begin Time: 2025-10-01 13:25 UTC
Yesterday Maximum 2MeV Flux: 3601 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3533
Begin Time: 2025-10-01 13:25 UTC
Yesterday Maximum 2MeV Flux: 3601 pfu
Issue Time: 2025-10-02 04:18 UTC
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2025-10-02 04:18 UTC
Valid To: 2025-10-02 12:00 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: 2025-10-02 04:18 UTC
Valid To: 2025-10-02 12:00 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: 2025-10-02 04:03 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-10-02 03:51 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: 2025-10-02 03:51 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: 2025-10-02 03:35 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-10-02 03:22 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: 2025-10-02 03:22 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: 2025-10-02 02:49 UTC
ALERT: Type II Radio Emission
Begin Time: 2025-10-02 02:09 UTC
Estimated Velocity: 508 km/s
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: 2025-10-02 02:09 UTC
Estimated Velocity: 508 km/s
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: 2025-10-02 01:39 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-10-02 01:35 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: 2025-10-02 01:35 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: 2025-10-01 23:29 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day
Oct 02: G2 (Moderate) Oct 03: None (Below G1) Oct 04: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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.
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day
Oct 02: G2 (Moderate) Oct 03: None (Below G1) Oct 04: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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: 2025-10-01 20:36 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-10-01 20:29 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: 2025-10-01 20:29 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: 2025-10-01 20:35 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 611
Valid From: 2025-09-30 02:52 UTC
Now Valid Until: 2025-10-02 12:00 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: 611
Valid From: 2025-09-30 02:52 UTC
Now Valid Until: 2025-10-02 12:00 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: 2025-10-01 19:55 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2111
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-02 18:00 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: 2111
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-02 18:00 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: 2025-10-01 19:54 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5093
Valid From: 2025-09-29 06:45 UTC
Now Valid Until: 2025-10-03 00:00 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: 5093
Valid From: 2025-09-29 06:45 UTC
Now Valid Until: 2025-10-03 00:00 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: 2025-10-01 19:53 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-10-01 19:46 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: 2025-10-01 19:46 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: 2025-10-01 17:15 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-10-01 17:06 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: 2025-10-01 17:06 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: 2025-10-01 13:54 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-10-01 13:44 UTC
Synoptic Period: 1200-1500 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: 2025-10-01 13:44 UTC
Synoptic Period: 1200-1500 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: 2025-10-01 13:33 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2025-10-01 13:25 UTC
Station: GOES19
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2025-10-01 13:25 UTC
Station: GOES19
Issue Time: 2025-10-01 13:11 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 610
Valid From: 2025-09-30 02:52 UTC
Now Valid Until: 2025-10-01 18:00 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: 610
Valid From: 2025-09-30 02:52 UTC
Now Valid Until: 2025-10-01 18:00 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: 2025-10-01 12:56 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2110
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-01 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: 2110
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-01 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: 2025-10-01 12:55 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-10-01 12:43 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: 2025-10-01 12:43 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: 2025-10-01 12:15 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2025-10-01 11:32 UTC
Maximum Time: 2025-10-01 11:32 UTC
End Time: 2025-10-01 11:32 UTC
Duration: 1 minutes
Peak Flux: 190 sfu
Latest Penticton Noon Flux: 187 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: 2025-10-01 11:32 UTC
Maximum Time: 2025-10-01 11:32 UTC
End Time: 2025-10-01 11:32 UTC
Duration: 1 minutes
Peak Flux: 190 sfu
Latest Penticton Noon Flux: 187 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: 2025-10-01 11:54 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2109
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-01 15:00 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: 2109
Valid From: 2025-09-30 01:14 UTC
Now Valid Until: 2025-10-01 15:00 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: 2025-10-01 11:53 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5092
Valid From: 2025-09-29 06:45 UTC
Now Valid Until: 2025-10-01 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: 5092
Valid From: 2025-09-29 06:45 UTC
Now Valid Until: 2025-10-01 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: 2025-10-01 08:47 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-10-01 08:33 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: 2025-10-01 08:33 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.
Built 2025-10-04 05:20 from source
