SeadedLast update:
| Time UTC | DSCOVR | ACE | ||||
|---|---|---|---|---|---|---|
| Solar Wind | GSM | Solar Wind | GSM | |||
| Proton Density | Bulk Speed | Bz | Proton Density | Bulk Speed | Bz | |
| 01:52 | - | - | - | - | - | - |
| 01:51 | - | - | - | - | - | - |
| 01:50 | 2.76 | 656.6 | - | - | - | - |
| 01:49 | 3.55 | 719.0 | - | - | - | - |
| 01:48 | 3.54 | 718.0 | 5.09 | - | - | - |
| 01:47 | 3.28 | 698.4 | 5.23 | - | - | - |
| 01:46 | 0.24 | 596.8 | 5.90 | - | - | - |
| 01:45 | 2.79 | 643.7 | 6.18 | - | - | - |
| 01:44 | 3.38 | 684.8 | 6.15 | - | - | - |
| 01:43 | 3.02 | 701.2 | 6.08 | - | - | - |
| 01:42 | 4.10 | 703.7 | 6.02 | - | - | - |
| 01:41 | 3.34 | 660.0 | 6.31 | - | - | - |
| 01:40 | 3.00 | 663.7 | 6.20 | - | - | - |
| 01:39 | 3.11 | 677.2 | 5.82 | - | - | - |
| 01:38 | 3.37 | 693.0 | 5.02 | - | - | - |
| 01:37 | 3.00 | 684.8 | 4.02 | - | - | - |
| 01:36 | 2.01 | 644.9 | 3.74 | - | - | - |
| 01:35 | 2.87 | 681.4 | 2.11 | - | - | - |
| 01:34 | 3.07 | 692.5 | 1.51 | - | - | - |
| 01:33 | 2.76 | 692.2 | -0.18 | - | - | - |
| 01:32 | 1.62 | 659.4 | -0.99 | - | - | - |
| 01:31 | 2.24 | 681.6 | -1.07 | - | - | - |
| 01:30 | 2.92 | 711.7 | -1.54 | - | - | - |
| 01:29 | 3.74 | 708.2 | -1.32 | - | - | - |
| 01:28 | 2.00 | 654.3 | 1.80 | - | - | - |
| 01:27 | 2.68 | 688.3 | -0.33 | - | - | - |
| 01:26 | 2.70 | 705.2 | -2.32 | - | - | - |
| 01:25 | 1.98 | 669.6 | -0.84 | - | - | - |
| 01:24 | 2.19 | 666.7 | -0.80 | - | - | - |
| 01:23 | 2.72 | 680.7 | -1.37 | - | - | - |
| 01:22 | 2.95 | 684.3 | -1.34 | - | - | - |
| 01:21 | 2.78 | 683.8 | -0.93 | - | - | - |
| 01:20 | 2.33 | 692.4 | 0.60 | - | - | - |
| 01:19 | 2.49 | 729.3 | 0.17 | - | - | - |
| 01:18 | 2.74 | 733.5 | -1.88 | - | - | - |
| 01:17 | 1.43 | 657.7 | -1.88 | - | - | - |
| 01:16 | 1.65 | - | -2.55 | - | - | - |
| 01:15 | 1.65 | 709.1 | -1.21 | - | - | - |
| 01:14 | 2.28 | 724.8 | -0.01 | - | - | - |
| 01:13 | 2.42 | 720.4 | -1.52 | - | - | - |
| 01:12 | 1.53 | 656.0 | -2.42 | - | - | - |
| 01:11 | 2.49 | 675.1 | -2.36 | - | - | - |
| 01:10 | 2.92 | 694.6 | -2.97 | - | - | - |
| 01:09 | 2.92 | 704.1 | -4.42 | - | - | - |
| 01:08 | 2.61 | 700.1 | -3.07 | - | - | - |
| 01:07 | 2.35 | 703.8 | -0.94 | - | - | - |
| 01:06 | 2.38 | 708.8 | -0.54 | - | - | - |
| 01:05 | 2.28 | 684.0 | -1.05 | - | - | - |
| 01:04 | 2.28 | 665.6 | -0.86 | - | - | - |
| 01:03 | 2.97 | 706.3 | -1.78 | - | - | - |
| 01:02 | 2.93 | 725.7 | -2.32 | - | - | - |
| 01:01 | 2.49 | 711.9 | -1.76 | - | - | - |
| 01:00 | 1.53 | 638.1 | -1.14 | - | - | - |
| 00:59 | 2.42 | 680.6 | -2.43 | 2.4 | 680.6 | -2.4 |
| 00:58 | 3.07 | 669.1 | -3.15 | 3.1 | 669.1 | -3.1 |
| 00:57 | 3.29 | 698.6 | -2.69 | 3.3 | 698.6 | -2.7 |
| 00:56 | 2.02 | 663.3 | -3.32 | 2.0 | 663.3 | -3.3 |
| 00:55 | 2.24 | 678.6 | -3.35 | 2.2 | 678.6 | -3.3 |
| 00:54 | 2.38 | 680.1 | -3.43 | 2.4 | 680.1 | -3.4 |
| 00:53 | 2.99 | 698.2 | -3.37 | 3.0 | 698.2 | -3.4 |
| 00:52 | 2.30 | 668.5 | -3.25 | 2.3 | 668.5 | -3.3 |
| 00:51 | 2.24 | 670.8 | -4.31 | 2.2 | 670.8 | -4.3 |
| 00:50 | 2.69 | 701.4 | -4.55 | 2.7 | 701.4 | -4.5 |
| 00:49 | 2.25 | 709.3 | -5.20 | 2.2 | 709.3 | -5.2 |
| 00:48 | 1.82 | 714.7 | -5.19 | 1.8 | 714.7 | -5.2 |
| 00:47 | 1.83 | 702.0 | -4.84 | 1.8 | 702.0 | -4.8 |
| 00:46 | 2.28 | 695.4 | -4.57 | 2.3 | 695.4 | -4.6 |
| 00:45 | 2.26 | 698.4 | -5.35 | 2.3 | 698.4 | -5.3 |
| 00:44 | 1.34 | 655.1 | -4.48 | 1.3 | 655.1 | -4.5 |
| 00:43 | - | - | -4.78 | - | - | -4.8 |
| 00:42 | 2.63 | 716.9 | -5.06 | 2.6 | 716.9 | -5.1 |
| 00:41 | 2.11 | 716.5 | -3.68 | 2.1 | 716.5 | -3.7 |
| 00:40 | 2.16 | 677.7 | -5.56 | 2.2 | 677.7 | -5.6 |
| 00:39 | 2.38 | 706.4 | -5.72 | 2.4 | 706.4 | -5.7 |
| 00:38 | 2.32 | 701.9 | -5.91 | 2.3 | 701.9 | -5.9 |
| 00:37 | 0.98 | 636.4 | -5.71 | 1.0 | 636.4 | -5.7 |
| 00:36 | 0.85 | 626.8 | -4.97 | 0.8 | 626.8 | -5.0 |
| 00:35 | 1.59 | 675.1 | -4.79 | 1.6 | 675.1 | -4.8 |
| 00:34 | 2.24 | 702.1 | -3.73 | 2.2 | 702.1 | -3.7 |
| 00:33 | 2.65 | 703.7 | -4.93 | 2.6 | 703.7 | -4.9 |
| 00:32 | 2.54 | 706.7 | -5.20 | 2.5 | 706.7 | -5.2 |
| 00:31 | 2.49 | 698.0 | -5.40 | 2.5 | 698.0 | -5.4 |
| 00:30 | 2.71 | 703.0 | -5.28 | 2.7 | 703.0 | -5.3 |
| 00:29 | 2.47 | 685.5 | -4.87 | 2.5 | 685.5 | -4.9 |
| 00:28 | 3.16 | 714.8 | -4.42 | 3.2 | 714.8 | -4.4 |
| 00:27 | 2.55 | 694.4 | -4.33 | 2.5 | 694.4 | -4.3 |
| 00:26 | 1.76 | 676.0 | -4.58 | 1.8 | 676.0 | -4.6 |
| 00:25 | 2.69 | 702.4 | -3.79 | 2.7 | 702.4 | -3.8 |
| 00:24 | 2.47 | 690.5 | -2.77 | 2.5 | 690.5 | -2.8 |
| 00:23 | 3.22 | 710.2 | -0.95 | 3.2 | 710.2 | -1.0 |
| 00:22 | 3.11 | 705.5 | 2.28 | 3.1 | 705.5 | 2.3 |
| 00:21 | 3.09 | 707.5 | 2.81 | 3.1 | 707.5 | 2.8 |
| 00:20 | 2.66 | 678.3 | 2.00 | 2.7 | 678.3 | 2.0 |
| 00:19 | 2.67 | 691.7 | 1.39 | 2.7 | 691.7 | 1.4 |
| 00:18 | 2.58 | 708.4 | 1.53 | 2.6 | 708.4 | 1.5 |
| 00:17 | 2.09 | 700.5 | 1.90 | 2.1 | 700.5 | 1.9 |
| 00:16 | 2.07 | 716.4 | -1.29 | 2.1 | 716.4 | -1.3 |
| 00:15 | 1.91 | 706.5 | -6.08 | 1.9 | 706.5 | -6.1 |
| 00:14 | 1.70 | 714.0 | -5.53 | 1.7 | 714.0 | -5.5 |
| 00:13 | 1.62 | 703.0 | -5.33 | 1.6 | 703.0 | -5.3 |
| 00:12 | 2.25 | 722.6 | -5.40 | 2.3 | 722.6 | -5.4 |
| 00:11 | 1.84 | 699.7 | -5.42 | 1.8 | 699.7 | -5.4 |
| 00:10 | 1.84 | - | -5.68 | 1.8 | - | -5.7 |
| 00:09 | 2.52 | 719.0 | -6.09 | 2.5 | 719.0 | -6.1 |
| 00:08 | 2.50 | 733.6 | -6.28 | 2.5 | 733.6 | -6.3 |
| 00:07 | 2.42 | 718.3 | -6.13 | 2.4 | 718.3 | -6.1 |
| 00:06 | 1.73 | 715.3 | -6.44 | 1.7 | 715.3 | -6.4 |
| 00:05 | 2.28 | 717.6 | -5.67 | 2.3 | 717.6 | -5.7 |
| 00:04 | 1.82 | 704.8 | -5.73 | 1.8 | 704.8 | -5.7 |
| 00:03 | 1.11 | 685.0 | -6.08 | 1.1 | 685.0 | -6.1 |
| 00:02 | 1.32 | 673.6 | -5.68 | 1.3 | 673.6 | -5.7 |
| 00:01 | 1.69 | 690.5 | -4.51 | 1.7 | 690.5 | -4.5 |
| 00:00 | 1.65 | 716.2 | -6.43 | 1.7 | 716.2 | -6.4 |
| 23:59 | 1.56 | 706.7 | -6.48 | 1.6 | 706.7 | -6.5 |
| 23:58 | 1.70 | 712.3 | -6.56 | 1.7 | 712.3 | -6.6 |
| 23:57 | 1.32 | 708.6 | -6.62 | 1.3 | 708.6 | -6.6 |
| 23:56 | 1.60 | 697.5 | -5.46 | 1.6 | 697.5 | -5.5 |
| 23:55 | 1.38 | 683.6 | -4.93 | 1.4 | 683.6 | -4.9 |
| 23:54 | 1.59 | 704.3 | -5.33 | 1.6 | 704.3 | -5.3 |
| 23:53 | 1.49 | 716.2 | -5.39 | 1.5 | 716.2 | -5.4 |
Built 2025-06-01 01:53 from source
| Solar wind parameters of the latest hour by NOAA | |||
|---|---|---|---|
| parameter | min | max | mean |
| IMF Bz [nT] | -5.3 | 6.3 | -1.4 |
| velocity [km/s] | 638.1 | 733.5 | 688.9 |
| density [cm-3] | 1.3 | 3.7 | 2.5 |
| Geomagnetic activity (RX [nT]) | ||
|---|---|---|
| site | latest hour | next hour (RXmin, RXmax) |
| Kevo (KEV) | 503 | 107 | 518 |
| Maasi (MAS) | 481 | 116 | 586 |
| Kilpisjärvi (KIL) | 499 | 82 | 464 |
| Ivalo (IVA) | 483 | 63 | 469 |
| Muonio (MUO) | 512 | 48 | 467 |
| Sodankylä (SOD) | 515 | 43 | 465 |
| Pello (PEL) | 458 | 40 | 437 |
| Oulujärvi (OUJ) | 350 | 23 | 281 |
| Mekrijärvi (MEK) | 117 | 16 | 103 |
| Hankasalmi (HAN) | 107 | 7 | 115 |
| Nurmijärvi (NUR) | 72 | 8 | 85 |
| Tartu (TAR) | 53 | 5 | 43 |
| low | increased | moderate | high | very high |
Short explanation of the method
AurorasNow! (Finnish Meteorological Institute)Built 2025-06-01 01:47 from source
Issue Time: 2025-06-01 00:55 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025-06-01 00:54 UTC
Valid To: 2025-06-01 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: 2025-06-01 00:54 UTC
Valid To: 2025-06-01 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.
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 2025-06-01 00:57 from source
