SettingsLast update:
| Time UTC | DSCOVR | ACE | ||||
|---|---|---|---|---|---|---|
| Solar Wind | GSM | Solar Wind | GSM | |||
| Proton Density | Bulk Speed | Bz | Proton Density | Bulk Speed | Bz | |
| 23:23 | - | - | - | - | - | - |
| 23:22 | - | - | - | - | - | - |
| 23:21 | - | - | - | - | - | - |
| 23:20 | - | - | -4.09 | - | - | - |
| 23:19 | 2.24 | 693.9 | -3.74 | - | - | - |
| 23:18 | 1.61 | 661.8 | -0.94 | - | - | - |
| 23:17 | 2.27 | 676.1 | -0.25 | - | - | - |
| 23:16 | 3.04 | 694.8 | -1.30 | - | - | - |
| 23:15 | 2.82 | 679.5 | -1.47 | - | - | - |
| 23:14 | 2.11 | 683.5 | -1.83 | - | - | - |
| 23:13 | 1.82 | 712.3 | -0.94 | - | - | - |
| 23:12 | 2.02 | 714.0 | -2.44 | - | - | - |
| 23:11 | 1.96 | 696.1 | -2.52 | - | - | - |
| 23:10 | 1.63 | 665.8 | -1.84 | - | - | - |
| 23:09 | 2.59 | 710.2 | -2.50 | - | - | - |
| 23:08 | 2.31 | 692.2 | -0.63 | - | - | - |
| 23:07 | 2.76 | 707.2 | 0.23 | 2.8 | 707.2 | 0.2 |
| 23:06 | 2.21 | 693.3 | 0.16 | 2.2 | 693.3 | 0.2 |
| 23:05 | 2.00 | 666.3 | -0.12 | 2.0 | 666.3 | -0.1 |
| 23:04 | 1.98 | 663.9 | 0.60 | 2.0 | 663.9 | 0.6 |
| 23:03 | 2.57 | 706.5 | -0.71 | 2.6 | 706.5 | -0.7 |
| 23:02 | 2.00 | 679.4 | 0.19 | 2.0 | 679.4 | 0.2 |
| 23:01 | 2.82 | 691.1 | -0.03 | 2.8 | 691.1 | -0.0 |
| 23:00 | 3.55 | 721.6 | 1.41 | 3.5 | 721.6 | 1.4 |
| 22:59 | 3.27 | 742.2 | 4.33 | 3.3 | 742.2 | 4.3 |
| 22:58 | 4.06 | 711.0 | 2.35 | 4.1 | 711.0 | 2.4 |
| 22:57 | 5.08 | 691.6 | 4.70 | 5.1 | 691.6 | 4.7 |
| 22:56 | 4.25 | 750.5 | 1.07 | 4.2 | 750.5 | 1.1 |
| 22:55 | 3.48 | 775.2 | 4.24 | 3.5 | 775.2 | 4.2 |
| 22:54 | 3.37 | 740.9 | 4.44 | 3.4 | 740.9 | 4.4 |
| 22:53 | 6.85 | 694.8 | 5.22 | 6.8 | 694.8 | 5.2 |
| 22:52 | 2.77 | 748.5 | 4.39 | 2.8 | 748.5 | 4.4 |
| 22:51 | 5.51 | 718.0 | 3.79 | 5.5 | 718.0 | 3.8 |
| 22:50 | 2.30 | 691.4 | 2.58 | 2.3 | 691.4 | 2.6 |
| 22:49 | 6.14 | 708.2 | 4.14 | 6.1 | 708.2 | 4.1 |
| 22:48 | 5.03 | 745.5 | 4.98 | 5.0 | 745.5 | 5.0 |
| 22:47 | 4.72 | 744.3 | 4.70 | 4.7 | 744.3 | 4.7 |
| 22:46 | 2.62 | 668.3 | 4.47 | 2.6 | 668.3 | 4.5 |
| 22:45 | 0.98 | 632.0 | 3.30 | 1.0 | 632.0 | 3.3 |
| 22:44 | 2.05 | 697.3 | 0.15 | 2.0 | 697.3 | 0.2 |
| 22:43 | 2.84 | 714.2 | -2.36 | 2.8 | 714.2 | -2.4 |
| 22:42 | 2.19 | 664.9 | 1.10 | 2.2 | 664.9 | 1.1 |
| 22:41 | 2.19 | 649.3 | 3.50 | 2.2 | 649.3 | 3.5 |
| 22:40 | 3.01 | 683.9 | -0.40 | 3.0 | 683.9 | -0.4 |
| 22:39 | 3.04 | 742.2 | 1.09 | 3.0 | 742.2 | 1.1 |
| 22:38 | 2.83 | 745.5 | -0.43 | 2.8 | 745.5 | -0.4 |
| 22:37 | 4.16 | 633.3 | 5.34 | 4.2 | 633.3 | 5.3 |
| 22:36 | 2.90 | 672.3 | 5.42 | 2.9 | 672.3 | 5.4 |
| 22:35 | 3.21 | 675.7 | 3.04 | 3.2 | 675.7 | 3.0 |
| 22:34 | 3.57 | 679.9 | 2.41 | 3.6 | 679.9 | 2.4 |
| 22:33 | 2.89 | 704.5 | 3.60 | 2.9 | 704.5 | 3.6 |
| 22:32 | 2.46 | 686.8 | 4.28 | 2.5 | 686.8 | 4.3 |
| 22:31 | 2.39 | 683.3 | 3.74 | 2.4 | 683.3 | 3.7 |
| 22:30 | 1.48 | 639.9 | 3.27 | 1.5 | 639.9 | 3.3 |
| 22:29 | 2.91 | 669.3 | 1.55 | 2.9 | 669.3 | 1.6 |
| 22:28 | 5.13 | 676.3 | 1.62 | 5.1 | 676.3 | 1.6 |
| 22:27 | 4.24 | 684.2 | 2.36 | 4.2 | 684.2 | 2.4 |
| 22:26 | 1.88 | 669.4 | 2.24 | 1.9 | 669.4 | 2.2 |
| 22:25 | 2.02 | 659.9 | 0.00 | 2.0 | 659.9 | 0.0 |
| 22:24 | 3.46 | 704.7 | 0.20 | 3.5 | 704.7 | 0.2 |
| 22:23 | 3.60 | 712.9 | 2.15 | 3.6 | 712.9 | 2.2 |
| 22:22 | 3.11 | 696.0 | 3.82 | 3.1 | 696.0 | 3.8 |
| 22:21 | 2.81 | 654.2 | 5.06 | 2.8 | 654.2 | 5.1 |
| 22:20 | 3.75 | 701.1 | 4.93 | 3.8 | 701.1 | 4.9 |
| 22:19 | 3.49 | 679.4 | 4.99 | 3.5 | 679.4 | 5.0 |
| 22:18 | 2.38 | 710.6 | 3.38 | 2.4 | 710.6 | 3.4 |
| 22:17 | 1.17 | 654.1 | -3.87 | 1.2 | 654.1 | -3.9 |
| 22:16 | 1.30 | 667.7 | 1.83 | 1.3 | 667.7 | 1.8 |
| 22:15 | 1.25 | 690.7 | -2.42 | 1.3 | 690.7 | -2.4 |
| 22:14 | 1.91 | 691.6 | -3.03 | 1.9 | 691.6 | -3.0 |
| 22:13 | 1.70 | 675.9 | -2.72 | 1.7 | 675.9 | -2.7 |
| 22:12 | 1.35 | 673.7 | -2.68 | 1.4 | 673.7 | -2.7 |
| 22:11 | 1.43 | 693.1 | -5.40 | 1.4 | 693.1 | -5.4 |
| 22:10 | 1.33 | 685.9 | -4.81 | 1.3 | 685.9 | -4.8 |
| 22:09 | 1.10 | 672.0 | -4.75 | 1.1 | 672.0 | -4.8 |
| 22:08 | 1.32 | 682.9 | -3.30 | 1.3 | 682.9 | -3.3 |
| 22:07 | 1.73 | 664.6 | -3.08 | 1.7 | 664.6 | -3.1 |
| 22:06 | 2.10 | 667.9 | -3.40 | 2.1 | 667.9 | -3.4 |
| 22:05 | 1.00 | 652.9 | -2.40 | 1.0 | 652.9 | -2.4 |
| 22:04 | 1.34 | 706.1 | -3.75 | 1.3 | 706.1 | -3.8 |
| 22:03 | 1.40 | 673.5 | -0.97 | 1.4 | 673.5 | -1.0 |
| 22:02 | 2.13 | 698.2 | -2.02 | 2.1 | 698.2 | -2.0 |
| 22:01 | 1.76 | 675.9 | -1.03 | 1.8 | 675.9 | -1.0 |
| 22:00 | 1.73 | 673.8 | -0.99 | 1.7 | 673.8 | -1.0 |
| 21:59 | - | - | - | - | - | - |
| 21:58 | 1.21 | 731.7 | 3.98 | 1.2 | 731.7 | 4.0 |
| 21:57 | 0.95 | 630.3 | -2.87 | 0.9 | 630.3 | -2.9 |
| 21:56 | 1.43 | 648.3 | -3.87 | 1.4 | 648.3 | -3.9 |
| 21:55 | 1.97 | 672.8 | -2.19 | 2.0 | 672.8 | -2.2 |
| 21:54 | 2.42 | 686.3 | -0.88 | 2.4 | 686.3 | -0.9 |
| 21:53 | 2.52 | 674.3 | -0.53 | 2.5 | 674.3 | -0.5 |
| 21:52 | 2.84 | 663.6 | 1.19 | 2.8 | 663.6 | 1.2 |
| 21:51 | 4.06 | 691.6 | 4.49 | 4.1 | 691.6 | 4.5 |
| 21:50 | 2.85 | 681.1 | 1.99 | 2.8 | 681.1 | 2.0 |
| 21:49 | 2.60 | 665.1 | 2.86 | 2.6 | 665.1 | 2.9 |
| 21:48 | 3.52 | 736.5 | 3.51 | 3.5 | 736.5 | 3.5 |
| 21:47 | 2.60 | 699.8 | 4.49 | 2.6 | 699.8 | 4.5 |
| 21:46 | 5.18 | 707.6 | 5.75 | 5.2 | 707.6 | 5.7 |
| 21:45 | 2.64 | 676.4 | 3.88 | 2.6 | 676.4 | 3.9 |
| 21:44 | 2.75 | 715.5 | 5.52 | 2.8 | 715.5 | 5.5 |
| 21:43 | 1.67 | 707.6 | 1.35 | 1.7 | 707.6 | 1.3 |
| 21:42 | 1.34 | 709.7 | -4.84 | 1.3 | 709.7 | -4.8 |
| 21:41 | 1.42 | 660.7 | -4.14 | 1.4 | 660.7 | -4.1 |
| 21:40 | 1.90 | 662.1 | -2.03 | 1.9 | 662.1 | -2.0 |
| 21:39 | 2.87 | 699.6 | 1.41 | 2.9 | 699.6 | 1.4 |
| 21:38 | 2.92 | 729.2 | 2.76 | 2.9 | 729.2 | 2.8 |
| 21:37 | 2.35 | 702.3 | 5.43 | 2.3 | 702.3 | 5.4 |
| 21:36 | 2.26 | 656.3 | 4.91 | 2.3 | 656.3 | 4.9 |
| 21:35 | 1.68 | 692.5 | 3.70 | 1.7 | 692.5 | 3.7 |
| 21:34 | 1.84 | 676.7 | -2.13 | 1.8 | 676.7 | -2.1 |
| 21:33 | 2.71 | 690.4 | -2.24 | 2.7 | 690.4 | -2.2 |
| 21:32 | 1.09 | 653.3 | -1.45 | 1.1 | 653.3 | -1.5 |
| 21:31 | 2.34 | 696.0 | -2.26 | 2.3 | 696.0 | -2.3 |
| 21:30 | 1.50 | 647.4 | -3.24 | 1.5 | 647.4 | -3.2 |
| 21:29 | 3.23 | 684.8 | -4.24 | 3.2 | 684.8 | -4.2 |
| 21:28 | 2.33 | 674.1 | -4.43 | 2.3 | 674.1 | -4.4 |
| 21:27 | 2.44 | 684.4 | -2.63 | 2.4 | 684.4 | -2.6 |
| 21:26 | 1.80 | 669.1 | 0.06 | 1.8 | 669.1 | 0.1 |
| 21:25 | 1.54 | 662.4 | -3.86 | 1.5 | 662.4 | -3.9 |
| 21:24 | 1.87 | 667.7 | -2.79 | 1.9 | 667.7 | -2.8 |
Built 2025-05-31 23:24 from source
| Solar wind parameters of the latest hour by NOAA | |||
|---|---|---|---|
| parameter | min | max | mean |
| IMF Bz [nT] | -3.9 | 5.4 | 1.8 |
| velocity [km/s] | 632.0 | 775.2 | 694.6 |
| density [cm-3] | 1.0 | 6.8 | 3.0 |
| Geomagnetic activity (RX [nT]) | ||
|---|---|---|
| site | latest hour | next hour (RXmin, RXmax) |
| Kevo (KEV) | 193 | 66 | 428 |
| Maasi (MAS) | 191 | 53 | 350 |
| Kilpisjärvi (KIL) | 200 | 56 | 399 |
| Ivalo (IVA) | 159 | 45 | 399 |
| Muonio (MUO) | 119 | 41 | 371 |
| Sodankylä (SOD) | 109 | 29 | 398 |
| Pello (PEL) | 86 | 22 | 398 |
| Oulujärvi (OUJ) | 54 | 11 | 220 |
| Mekrijärvi (MEK) | 34 | 7 | 45 |
| Hankasalmi (HAN) | 42 | 6 | 64 |
| Nurmijärvi (NUR) | 30 | 6 | 52 |
| Tartu (TAR) | 26 | 5 | 40 |
| low | increased | moderate | high | very high |
Short explanation of the method
AurorasNow! (Finnish Meteorological Institute)Built 2025-05-31 23:17 from source
Issue Time: 2025-05-31 22:26 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4979
Valid From: 2025-05-28 17:47 UTC
Now Valid Until: 2025-06-01 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: 4979
Valid From: 2025-05-28 17:47 UTC
Now Valid Until: 2025-06-01 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: 2025-05-31 19:57 UTC
WATCH: Geomagnetic Storm Category G4 or Greater Predicted
Highest Storm Level Predicted by Day
Jun 01: G4 (Severe) Jun 02: G4 (Severe) Jun 03: G2 (Moderate)
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
Jun 01: G4 (Severe) Jun 02: G4 (Severe) Jun 03: G2 (Moderate)
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: 2025-05-31 17:17 UTC
ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025-05-31 17:17 UTC
NOAA Scale: S1 - Minor
ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025-05-31 17:17 UTC
NOAA Scale: S1 - Minor
Issue Time: 2025-05-31 16:51 UTC
ALERT: Type IV Radio Emission
Begin Time: 2025-05-31 15:56 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: 2025-05-31 15:56 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: 2025-05-31 15:58 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2025-05-31 15:43 UTC
Maximum Time: 2025-05-31 15:44 UTC
End Time: 2025-05-31 15:47 UTC
Duration: 4 minutes
Peak Flux: 210 sfu
Latest Penticton Noon Flux: 157 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: 2025-05-31 15:43 UTC
Maximum Time: 2025-05-31 15:44 UTC
End Time: 2025-05-31 15:47 UTC
Duration: 4 minutes
Peak Flux: 210 sfu
Latest Penticton Noon Flux: 157 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: 2025-05-31 15:06 UTC
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2025-05-31 15:05 UTC
Valid To: 2025-06-01 06:00 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2025-05-31 15:05 UTC
Valid To: 2025-06-01 06:00 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
Issue Time: 2025-05-31 15:04 UTC
WATCH: Geomagnetic Storm Category G4 or Greater Predicted
Highest Storm Level Predicted by Day
Jun 01: G3 (Strong) Jun 02: G4 (Severe) Jun 03: G2 (Moderate)
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
Jun 01: G3 (Strong) Jun 02: G4 (Severe) Jun 03: G2 (Moderate)
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: 2025-05-31 13:40 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2025-05-31 13:27 UTC
Maximum Time: 2025-05-31 13:27 UTC
End Time: 2025-05-31 13:27 UTC
Duration: 1 minutes
Peak Flux: 330 sfu
Latest Penticton Noon Flux: 157 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: 2025-05-31 13:27 UTC
Maximum Time: 2025-05-31 13:27 UTC
End Time: 2025-05-31 13:27 UTC
Duration: 1 minutes
Peak Flux: 330 sfu
Latest Penticton Noon Flux: 157 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: 2025-05-31 08:44 UTC
ALERT: Type IV Radio Emission
Begin Time: 2025-05-31 07:34 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: 2025-05-31 07:34 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: 2025-05-31 08:43 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2025-05-31 08:16 UTC
Maximum Time: 2025-05-31 08:16 UTC
End Time: 2025-05-31 08:17 UTC
Duration: 1 minutes
Peak Flux: 220 sfu
Latest Penticton Noon Flux: 157 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: 2025-05-31 08:16 UTC
Maximum Time: 2025-05-31 08:16 UTC
End Time: 2025-05-31 08:17 UTC
Duration: 1 minutes
Peak Flux: 220 sfu
Latest Penticton Noon Flux: 157 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: 2025-05-31 06:34 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3472
Begin Time: 2025-05-30 01:55 UTC
Yesterday Maximum 2MeV Flux: 4876 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3472
Begin Time: 2025-05-30 01:55 UTC
Yesterday Maximum 2MeV Flux: 4876 pfu
Issue Time: 2025-05-31 05:08 UTC
ALERT: Type IV Radio Emission
Begin Time: 2025-05-31 00:15 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: 2025-05-31 00:15 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: 2025-05-31 01:46 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2025-05-30 23:39 UTC
Maximum Time: 2025-05-30 23:56 UTC
End Time: 2025-05-31 01:21 UTC
Duration: 102 minutes
Peak Flux: 1100 sfu
Latest Penticton Noon Flux: 157 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: 2025-05-30 23:39 UTC
Maximum Time: 2025-05-30 23:56 UTC
End Time: 2025-05-31 01:21 UTC
Duration: 102 minutes
Peak Flux: 1100 sfu
Latest Penticton Noon Flux: 157 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: 2025-05-31 01:41 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2025-05-30 23:31 UTC
Maximum Time: 2025-05-31 00:05 UTC
End Time: 2025-05-31 01:32 UTC
X-ray Class: M8.1
Location: N14E10
NOAA Scale: R2 - Moderate
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.
SUMMARY: X-ray Event exceeded M5
Begin Time: 2025-05-30 23:31 UTC
Maximum Time: 2025-05-31 00:05 UTC
End Time: 2025-05-31 01:32 UTC
X-ray Class: M8.1
Location: N14E10
NOAA Scale: R2 - Moderate
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.
Issue Time: 2025-05-31 00:23 UTC
ALERT: Type II Radio Emission
Begin Time: 2025-05-30 23:53 UTC
Estimated Velocity: 1938 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: 2025-05-30 23:53 UTC
Estimated Velocity: 1938 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: 2025-05-30 23:59 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025-05-30 23:59 UTC
NOAA Scale: R2 - Moderate
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025-05-30 23:59 UTC
NOAA Scale: R2 - Moderate
Issue Time: 2025-05-30 22:10 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4978
Valid From: 2025-05-28 17:47 UTC
Now Valid Until: 2025-05-31 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: 4978
Valid From: 2025-05-28 17:47 UTC
Now Valid Until: 2025-05-31 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: 2025-05-30 17:43 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2049
Valid From: 2025-05-29 01:13 UTC
Now Valid Until: 2025-05-31 03:00 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: 2049
Valid From: 2025-05-29 01:13 UTC
Now Valid Until: 2025-05-31 03:00 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: 2025-05-30 17:43 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4977
Valid From: 2025-05-28 17:47 UTC
Now Valid Until: 2025-05-31 06:00 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: 4977
Valid From: 2025-05-28 17:47 UTC
Now Valid Until: 2025-05-31 06:00 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: 2025-05-30 11:52 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3471
Begin Time: 2025-05-30 01:55 UTC
Yesterday Maximum 2MeV Flux: pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3471
Begin Time: 2025-05-30 01:55 UTC
Yesterday Maximum 2MeV Flux: pfu
Issue Time: 2025-05-30 11:42 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2048
Valid From: 2025-05-29 01:13 UTC
Now Valid Until: 2025-05-30 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: 2048
Valid From: 2025-05-29 01:13 UTC
Now Valid Until: 2025-05-30 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: 2025-05-30 06:29 UTC
ALERT: Type II Radio Emission
Begin Time: 2025-05-30 06:12 UTC
Estimated Velocity: 538 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: 2025-05-30 06:12 UTC
Estimated Velocity: 538 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: 2025-05-30 02:12 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2025-05-30 01:55 UTC
Station: GOES-19
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2025-05-30 01:55 UTC
Station: GOES-19
Issue Time: 2025-05-30 02:02 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-05-30 01:55 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: 2025-05-30 01:55 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: 2025-05-29 21:53 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-05-29 21:53 UTC
Synoptic Period: 2100-2400 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: 2025-05-29 21:53 UTC
Synoptic Period: 2100-2400 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: 2025-05-29 20:58 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-05-29 20:58 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: 2025-05-29 20:58 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: 2025-05-29 20:56 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2047
Valid From: 2025-05-29 01:13 UTC
Now Valid Until: 2025-05-30 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: 2047
Valid From: 2025-05-29 01:13 UTC
Now Valid Until: 2025-05-30 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: 2025-05-29 20:56 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4976
Valid From: 2025-05-28 17:47 UTC
Now Valid Until: 2025-05-30 21:00 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: 4976
Valid From: 2025-05-28 17:47 UTC
Now Valid Until: 2025-05-30 21:00 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: 2025-05-29 20:56 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 583
Valid From: 2025-05-29 01:26 UTC
Now Valid Until: 2025-05-30 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: 583
Valid From: 2025-05-29 01:26 UTC
Now Valid Until: 2025-05-30 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: 2025-05-29 18:59 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day
May 30: G2 (Moderate) May 31: G1 (Minor) Jun 01: G1 (Minor)
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
May 30: G2 (Moderate) May 31: G1 (Minor) Jun 01: G1 (Minor)
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: 2025-05-29 18:52 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-05-28 18:52 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: 2025-05-28 18:52 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: 2025-05-29 18:01 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-05-29 17:59 UTC
Synoptic Period: 1500-1800 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: 2025-05-29 17:59 UTC
Synoptic Period: 1500-1800 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: 2025-05-29 15:33 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-05-29 15:33 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: 2025-05-29 15:33 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: 2025-05-29 14:58 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-05-29 14:58 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: 2025-05-29 14:58 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: 2025-05-29 14:57 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 582
Valid From: 2025-05-29 01:26 UTC
Now Valid Until: 2025-05-29 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: 582
Valid From: 2025-05-29 01:26 UTC
Now Valid Until: 2025-05-29 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: 2025-05-29 13:57 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-05-29 13:56 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: 2025-05-29 13:56 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: 2025-05-29 10:35 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-05-29 10:07 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: 2025-05-29 10:07 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: 2025-05-29 08:28 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-05-29 08:17 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: 2025-05-29 08:17 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: 2025-05-29 04:53 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-05-29 04:50 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: 2025-05-29 04:50 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: 2025-05-29 02:16 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2025-05-29 02:16 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: 2025-05-29 02:16 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: 2025-05-29 02:12 UTC
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2025-05-29 02:11 UTC
Valid To: 2025-05-29 06:00 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: 2025-05-29 02:11 UTC
Valid To: 2025-05-29 06:00 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: 2025-05-29 01:30 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-05-29 01:29 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: 2025-05-29 01:29 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: 2025-05-29 01:26 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025-05-29 01:26 UTC
Valid To: 2025-05-29 15:00 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: 2025-05-29 01:26 UTC
Valid To: 2025-05-29 15:00 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: 2025-05-29 01:22 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-05-29 01:20 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: 2025-05-29 01:20 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: 2025-05-29 01:16 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025-05-29 01:13 UTC
Valid To: 2025-05-29 21:00 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: 2025-05-29 01:13 UTC
Valid To: 2025-05-29 21:00 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.
Issue Time: 2025-05-29 01:15 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4975
Valid From: 2025-05-28 17:47 UTC
Now Valid Until: 2025-05-29 21:00 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: 4975
Valid From: 2025-05-28 17:47 UTC
Now Valid Until: 2025-05-29 21:00 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: 2025-05-29 01:13 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025-05-29 01:10 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: 2025-05-29 01:10 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.
Built 2025-05-31 22:28 from source
