SettingsLast update:
| Time UTC | DSCOVR | ACE | ||||
|---|---|---|---|---|---|---|
| Solar Wind | GSM | Solar Wind | GSM | |||
| Proton Density | Bulk Speed | Bz | Proton Density | Bulk Speed | Bz | |
| 20:56 | - | - | - | - | - | - |
| 20:55 | - | - | - | - | - | - |
| 20:54 | - | - | 3.19 | - | - | - |
| 20:53 | - | - | 2.41 | - | - | - |
| 20:52 | - | - | 3.63 | - | - | - |
| 20:51 | 1.56 | 617.0 | 4.23 | - | - | - |
| 20:50 | 1.38 | 608.3 | 5.03 | - | - | - |
| 20:49 | 1.60 | 568.6 | 2.76 | - | - | - |
| 20:48 | 1.64 | 564.9 | 0.35 | 1.6 | 564.9 | 0.3 |
| 20:47 | 1.52 | 580.0 | -0.99 | 1.5 | 580.0 | -1.0 |
| 20:46 | 1.62 | 583.2 | -0.73 | 1.6 | 583.2 | -0.7 |
| 20:45 | 1.58 | 596.1 | 1.98 | 1.6 | 596.1 | 2.0 |
| 20:44 | 1.00 | 602.8 | 3.50 | 1.0 | 602.8 | 3.5 |
| 20:43 | 0.29 | 556.8 | -2.51 | 0.3 | 556.8 | -2.5 |
| 20:42 | 0.13 | 527.0 | -3.85 | 0.1 | 527.0 | -3.8 |
| 20:41 | 0.39 | 595.9 | -4.02 | 0.4 | 595.9 | -4.0 |
| 20:40 | 0.29 | 566.3 | -3.47 | 0.3 | 566.3 | -3.5 |
| 20:39 | 0.29 | 531.7 | -3.35 | 0.3 | 531.7 | -3.4 |
| 20:38 | 0.71 | 569.2 | -3.30 | 0.7 | 569.2 | -3.3 |
| 20:37 | 0.37 | 603.1 | -3.30 | 0.4 | 603.1 | -3.3 |
| 20:36 | 1.10 | 564.8 | -3.24 | 1.1 | 564.8 | -3.2 |
| 20:35 | 1.61 | 562.3 | -1.17 | 1.6 | 562.3 | -1.2 |
| 20:34 | 1.36 | 568.7 | -0.32 | 1.4 | 568.7 | -0.3 |
| 20:33 | 1.59 | 570.1 | -1.29 | 1.6 | 570.1 | -1.3 |
| 20:32 | 1.52 | 579.9 | -0.90 | 1.5 | 579.9 | -0.9 |
| 20:31 | 1.32 | 565.4 | -1.38 | 1.3 | 565.4 | -1.4 |
| 20:30 | 1.02 | 559.0 | -1.73 | 1.0 | 559.0 | -1.7 |
| 20:29 | 0.97 | 560.4 | -2.12 | 1.0 | 560.4 | -2.1 |
| 20:28 | 1.12 | 555.4 | -1.82 | 1.1 | 555.4 | -1.8 |
| 20:27 | 1.39 | 550.9 | -2.18 | 1.4 | 550.9 | -2.2 |
| 20:26 | 1.39 | 550.9 | -0.61 | 1.4 | 550.9 | -0.6 |
| 20:25 | - | - | -0.75 | - | - | -0.8 |
| 20:24 | - | - | -1.94 | - | - | -1.9 |
| 20:23 | 0.81 | 565.5 | -2.62 | 0.8 | 565.5 | -2.6 |
| 20:22 | 1.13 | 556.2 | -2.11 | 1.1 | 556.2 | -2.1 |
| 20:21 | 1.39 | 554.1 | -1.34 | 1.4 | 554.1 | -1.3 |
| 20:20 | 1.33 | 550.5 | -0.72 | 1.3 | 550.5 | -0.7 |
| 20:19 | 1.97 | 565.6 | 0.50 | 2.0 | 565.6 | 0.5 |
| 20:18 | 1.94 | 556.5 | 1.65 | 1.9 | 556.5 | 1.6 |
| 20:17 | 2.04 | 557.6 | -0.59 | 2.0 | 557.6 | -0.6 |
| 20:16 | 1.85 | 560.2 | 0.63 | 1.9 | 560.2 | 0.6 |
| 20:15 | 1.64 | 562.3 | 2.63 | 1.6 | 562.3 | 2.6 |
| 20:14 | 1.60 | 579.5 | 3.01 | 1.6 | 579.5 | 3.0 |
| 20:13 | 1.00 | 568.3 | 2.78 | 1.0 | 568.3 | 2.8 |
| 20:12 | 0.87 | 548.5 | -3.54 | 0.9 | 548.5 | -3.5 |
| 20:11 | 1.39 | 561.6 | -1.99 | 1.4 | 561.6 | -2.0 |
| 20:10 | 0.80 | 558.6 | -2.07 | 0.8 | 558.6 | -2.1 |
| 20:09 | 1.18 | 558.2 | -2.24 | 1.2 | 558.2 | -2.2 |
| 20:08 | 1.31 | 573.7 | -1.85 | 1.3 | 573.7 | -1.9 |
| 20:07 | 1.12 | 566.6 | -1.93 | 1.1 | 566.6 | -1.9 |
| 20:06 | 0.81 | 555.3 | -1.31 | 0.8 | 555.3 | -1.3 |
| 20:05 | 0.85 | 561.6 | -2.72 | 0.8 | 561.6 | -2.7 |
| 20:04 | 0.85 | 561.6 | -1.35 | 0.8 | 561.6 | -1.4 |
| 20:03 | 5.39 | 639.4 | -2.72 | 5.4 | 639.4 | -2.7 |
| 20:02 | 1.80 | 560.6 | -2.22 | 1.8 | 560.6 | -2.2 |
| 20:01 | 1.14 | 548.7 | -2.07 | 1.1 | 548.7 | -2.1 |
| 20:00 | 1.15 | 543.7 | -1.86 | 1.1 | 543.7 | -1.9 |
| 19:59 | 1.43 | 552.8 | -1.55 | 1.4 | 552.8 | -1.5 |
| 19:58 | 1.05 | 554.0 | -1.74 | 1.0 | 554.0 | -1.7 |
| 19:57 | 0.83 | 549.9 | -2.90 | 0.8 | 549.9 | -2.9 |
| 19:56 | 1.16 | 552.8 | -1.98 | 1.2 | 552.8 | -2.0 |
| 19:55 | 1.53 | 554.5 | -1.04 | 1.5 | 554.5 | -1.0 |
| 19:54 | 1.53 | 554.5 | -1.40 | 1.5 | 554.5 | -1.4 |
| 19:53 | - | - | -1.49 | - | - | -1.5 |
| 19:52 | 2.16 | 568.8 | -1.66 | 2.2 | 568.8 | -1.7 |
| 19:51 | 2.13 | 568.1 | -1.03 | 2.1 | 568.1 | -1.0 |
| 19:50 | 1.73 | 558.0 | -0.57 | 1.7 | 558.0 | -0.6 |
| 19:49 | 2.05 | 561.5 | -0.44 | 2.0 | 561.5 | -0.4 |
| 19:48 | 1.91 | 557.5 | -0.31 | 1.9 | 557.5 | -0.3 |
| 19:47 | 1.90 | 560.1 | -0.21 | 1.9 | 560.1 | -0.2 |
| 19:46 | 1.94 | 561.9 | -0.24 | 1.9 | 561.9 | -0.2 |
| 19:45 | 1.76 | 560.2 | -0.29 | 1.8 | 560.2 | -0.3 |
| 19:44 | 1.90 | 559.8 | -0.48 | 1.9 | 559.8 | -0.5 |
| 19:43 | 1.86 | 559.9 | -0.73 | 1.9 | 559.9 | -0.7 |
| 19:42 | 1.72 | 555.1 | -0.37 | 1.7 | 555.1 | -0.4 |
| 19:41 | 1.58 | 553.2 | -0.48 | 1.6 | 553.2 | -0.5 |
| 19:40 | 1.59 | 556.5 | -0.54 | 1.6 | 556.5 | -0.5 |
| 19:39 | 1.72 | 561.9 | -0.78 | 1.7 | 561.9 | -0.8 |
| 19:38 | 1.55 | 567.1 | -0.54 | 1.6 | 567.1 | -0.5 |
| 19:37 | 1.32 | 557.8 | -1.26 | 1.3 | 557.8 | -1.3 |
| 19:36 | 1.30 | 562.6 | -1.72 | 1.3 | 562.6 | -1.7 |
| 19:35 | 1.62 | 568.4 | -1.93 | 1.6 | 568.4 | -1.9 |
| 19:34 | 0.56 | 539.3 | -1.82 | 0.6 | 539.3 | -1.8 |
| 19:33 | 1.81 | 561.2 | -1.61 | 1.8 | 561.2 | -1.6 |
| 19:32 | 2.28 | 562.5 | -1.12 | 2.3 | 562.5 | -1.1 |
| 19:31 | 2.60 | 578.9 | 0.75 | 2.6 | 578.9 | 0.8 |
| 19:30 | 1.70 | 545.4 | 0.82 | 1.7 | 545.4 | 0.8 |
| 19:29 | 1.46 | 547.0 | 0.54 | 1.5 | 547.0 | 0.5 |
| 19:28 | 2.44 | 564.5 | 0.85 | 2.4 | 564.5 | 0.9 |
| 19:27 | 2.88 | 574.3 | 0.77 | 2.9 | 574.3 | 0.8 |
| 19:26 | 2.21 | 560.6 | 1.05 | 2.2 | 560.6 | 1.0 |
| 19:25 | 1.68 | 553.8 | 1.62 | 1.7 | 553.8 | 1.6 |
| 19:24 | 1.87 | 566.3 | 1.02 | 1.9 | 566.3 | 1.0 |
| 19:23 | 1.76 | 559.7 | -0.43 | 1.8 | 559.7 | -0.4 |
| 19:22 | 1.49 | 542.7 | 0.44 | 1.5 | 542.7 | 0.4 |
| 19:21 | 2.58 | 568.5 | 1.18 | 2.6 | 568.5 | 1.2 |
| 19:20 | - | - | 0.93 | - | - | 0.9 |
| 19:19 | 2.32 | 560.0 | 1.46 | 2.3 | 560.0 | 1.5 |
| 19:18 | 2.32 | 560.0 | 1.23 | 2.3 | 560.0 | 1.2 |
| 19:17 | 3.31 | 571.7 | 2.86 | 3.3 | 571.7 | 2.9 |
| 19:16 | 2.87 | 568.4 | 2.83 | 2.9 | 568.4 | 2.8 |
| 19:15 | 2.95 | 586.1 | 1.91 | 2.9 | 586.1 | 1.9 |
| 19:14 | 2.51 | 570.9 | 2.58 | 2.5 | 570.9 | 2.6 |
| 19:13 | 2.21 | 561.9 | 2.92 | 2.2 | 561.9 | 2.9 |
| 19:12 | 2.37 | 561.9 | 2.82 | 2.4 | 561.9 | 2.8 |
| 19:11 | 2.86 | 567.6 | 2.71 | 2.9 | 567.6 | 2.7 |
| 19:10 | 2.74 | 565.4 | 1.80 | 2.7 | 565.4 | 1.8 |
| 19:09 | 2.34 | 559.9 | 2.07 | 2.3 | 559.9 | 2.1 |
| 19:08 | 2.23 | 559.0 | 1.53 | 2.2 | 559.0 | 1.5 |
| 19:07 | 2.10 | 557.9 | 0.95 | 2.1 | 557.9 | 1.0 |
| 19:06 | 1.99 | 558.1 | 0.66 | 2.0 | 558.1 | 0.7 |
| 19:05 | 2.17 | 564.4 | 0.76 | 2.2 | 564.4 | 0.8 |
| 19:04 | 2.23 | 565.8 | 1.15 | 2.2 | 565.8 | 1.2 |
| 19:03 | 2.44 | 568.4 | 1.07 | 2.4 | 568.4 | 1.1 |
| 19:02 | 1.95 | 558.5 | 1.12 | 1.9 | 558.5 | 1.1 |
| 19:01 | 2.16 | 567.7 | 0.51 | 2.2 | 567.7 | 0.5 |
| 19:00 | 1.81 | 563.6 | -0.04 | 1.8 | 563.6 | -0.0 |
| 18:59 | 1.47 | 571.1 | -0.40 | 1.5 | 571.1 | -0.4 |
| 18:58 | 2.12 | 573.1 | -1.66 | 2.1 | 573.1 | -1.7 |
| 18:57 | 2.29 | 570.9 | -0.40 | 2.3 | 570.9 | -0.4 |
Built 2026-01-23 20:57 from source
| Solar wind parameters of the latest hour by NOAA | |||
|---|---|---|---|
| parameter | min | max | mean |
| IMF Bz [nT] | -4.0 | 3.0 | -1.4 |
| velocity [km/s] | 527.0 | 639.4 | 562.0 |
| density [cm-3] | 0.1 | 5.4 | 1.4 |
| Geomagnetic activity (RX [nT]) | ||
|---|---|---|
| site | latest hour | next hour (RXmin, RXmax) |
| Kevo (KEV) | 116 | 67 | 577 |
| Maasi (MAS) | 71 | 61 | 626 |
| Kilpisjärvi (KIL) | 98 | 53 | 627 |
| Ivalo (IVA) | 104 | 50 | 525 |
| Muonio (MUO) | 130 | 38 | 553 |
| Sodankylä (SOD) | 139 | 29 | 489 |
| Pello (PEL) | 142 | 27 | 459 |
| Oulujärvi (OUJ) | 217 | 12 | 330 |
| Mekrijärvi (MEK) | 90 | 6 | 81 |
| Hankasalmi (HAN) | 95 | 8 | 119 |
| Nurmijärvi (NUR) | - | 9 | 91 |
| Tartu (TAR) | 18 | 8 | 66 |
| low | increased | moderate | high | very high |
Short explanation of the method
AurorasNow! (Finnish Meteorological Institute)Built 2026-01-23 20:47 from source
Issue Time: 2026-01-23 14:56 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5232
Valid From: 2026-01-22 22:24 UTC
Now Valid Until: 2026-01-23 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: 5232
Valid From: 2026-01-22 22:24 UTC
Now Valid Until: 2026-01-23 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: 2026-01-23 14:56 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2180
Valid From: 2026-01-22 23:25 UTC
Now Valid Until: 2026-01-23 21:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2180
Valid From: 2026-01-22 23:25 UTC
Now Valid Until: 2026-01-23 21:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-23 09:03 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5231
Valid From: 2026-01-22 22:24 UTC
Now Valid Until: 2026-01-23 18:00 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: 5231
Valid From: 2026-01-22 22:24 UTC
Now Valid Until: 2026-01-23 18:00 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: 2026-01-23 08:54 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2179
Valid From: 2026-01-22 23:25 UTC
Now Valid Until: 2026-01-23 15:00 UTC
Warning Condition: Onset
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: 2179
Valid From: 2026-01-22 23:25 UTC
Now Valid Until: 2026-01-23 15:00 UTC
Warning Condition: Onset
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: 2026-01-23 04:59 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3607
Begin Time: 2026-01-21 09:50 UTC
Yesterday Maximum 2MeV Flux: 5365 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3607
Begin Time: 2026-01-21 09:50 UTC
Yesterday Maximum 2MeV Flux: 5365 pfu
Issue Time: 2026-01-23 00:00 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5230
Valid From: 2026-01-22 22:24 UTC
Now Valid Until: 2026-01-23 15:00 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: 5230
Valid From: 2026-01-22 22:24 UTC
Now Valid Until: 2026-01-23 15:00 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: 2026-01-22 23:39 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026-01-22 23:39 UTC
Valid To: 2026-01-23 09:00 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: 2026-01-22 23:39 UTC
Valid To: 2026-01-23 09:00 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: 2026-01-22 23:29 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-22 23:27 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: 2026-01-22 23:27 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: 2026-01-22 23:25 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026-01-22 23:25 UTC
Valid To: 2026-01-23 09:00 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: 2026-01-22 23:25 UTC
Valid To: 2026-01-23 09:00 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: 2026-01-22 23:00 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026-01-22 22:54 UTC
Synoptic Period: 2100-2400 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: 2026-01-22 22:54 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2026-01-22 22:24 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026-01-22 22:24 UTC
Valid To: 2026-01-23 09:00 UTC
Warning Condition: Onset
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026-01-22 22:24 UTC
Valid To: 2026-01-23 09:00 UTC
Warning Condition: Onset
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2026-01-22 17:54 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2026-01-18 22:55 UTC
Maximum Time: 2026-01-19 19:15 UTC
End Time: 2026-01-22 05:45 UTC
Maximum 10MeV Flux: 37000 pfu
NOAA Scale: S4 - Severe
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2026-01-18 22:55 UTC
Maximum Time: 2026-01-19 19:15 UTC
End Time: 2026-01-22 05:45 UTC
Maximum 10MeV Flux: 37000 pfu
NOAA Scale: S4 - Severe
Issue Time: 2026-01-22 11:03 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 622
Valid From: 2026-01-22 01:24 UTC
Now Valid Until: 2026-01-22 18:00 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 622
Valid From: 2026-01-22 01:24 UTC
Now Valid Until: 2026-01-22 18:00 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
Issue Time: 2026-01-22 05:37 UTC
ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2026-01-22 05:20 UTC
NOAA Scale: S1 - Minor
ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2026-01-22 05:20 UTC
NOAA Scale: S1 - Minor
Issue Time: 2026-01-22 04:59 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3606
Begin Time: 2026-01-21 09:50 UTC
Yesterday Maximum 2MeV Flux: 3332 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3606
Begin Time: 2026-01-21 09:50 UTC
Yesterday Maximum 2MeV Flux: 3332 pfu
Issue Time: 2026-01-22 01:24 UTC
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2026-01-22 01:24 UTC
Valid To: 2026-01-22 12:00 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2026-01-22 01:24 UTC
Valid To: 2026-01-22 12:00 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
Issue Time: 2026-01-21 10:56 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5228
Valid From: 2026-01-16 02:54 UTC
Now Valid Until: 2026-01-22 18:00 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: 5228
Valid From: 2026-01-16 02:54 UTC
Now Valid Until: 2026-01-22 18:00 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: 2026-01-21 10:56 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2177
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-22 15:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2177
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-22 15:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-21 10:56 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 636
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 23:59 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 636
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 23:59 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-21 10:56 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 143
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 18:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 143
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 18:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-21 10:37 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 10:37 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 10:37 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-21 10:06 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026-01-21 09:50 UTC
Station: GOES19
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026-01-21 09:50 UTC
Station: GOES19
Issue Time: 2026-01-21 09:48 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-21 09:48 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: 2026-01-21 09:48 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: 2026-01-21 08:53 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-21 08:52 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-21 08:52 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-21 07:31 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day
Jan 22: G1 (Minor) Jan 23: None (Below G1) Jan 24: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day
Jan 22: G1 (Minor) Jan 23: None (Below G1) Jan 24: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-21 07:27 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 07:23 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 07:23 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-21 07:10 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-21 07:04 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: 2026-01-21 07:04 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: 2026-01-21 05:11 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-21 05:07 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-21 05:07 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-21 04:47 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 04:39 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 04:39 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-21 03:54 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-21 03:49 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: 2026-01-21 03:49 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: 2026-01-21 02:20 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-21 02:13 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: 2026-01-21 02:13 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: 2026-01-21 02:01 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5227
Valid From: 2026-01-16 02:54 UTC
Now Valid Until: 2026-01-21 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: 5227
Valid From: 2026-01-16 02:54 UTC
Now Valid Until: 2026-01-21 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: 2026-01-21 02:01 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2176
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 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: 2176
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 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: 2026-01-21 02:01 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 142
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 12:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 142
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 12:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-21 02:01 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 635
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 15:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 635
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 15:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-21 01:55 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2026-01-19 04:40 UTC
Maximum Time: 2026-01-19 19:15 UTC
End Time: 2026-01-20 13:35 UTC
Maximum 10MeV Flux: 37000 pfu
NOAA Scale: S4 - Severe
SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2026-01-19 04:40 UTC
Maximum Time: 2026-01-19 19:15 UTC
End Time: 2026-01-20 13:35 UTC
Maximum 10MeV Flux: 37000 pfu
NOAA Scale: S4 - Severe
Issue Time: 2026-01-21 00:35 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 00:32 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: 2026-01-21 00:32 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: 2026-01-21 00:28 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-21 00:13 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: 2026-01-21 00:13 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: 2026-01-21 00:08 UTC
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2026-01-20 23:59 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2026-01-20 23:59 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
Issue Time: 2026-01-20 23:55 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 620
Valid From: 2026-01-18 21:30 UTC
Now Valid Until: 2026-01-21 23:59 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 620
Valid From: 2026-01-18 21:30 UTC
Now Valid Until: 2026-01-21 23:59 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
Issue Time: 2026-01-20 22:42 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-20 22:43 UTC
Synoptic Period: 2100-2400 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: 2026-01-20 22:43 UTC
Synoptic Period: 2100-2400 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: 2026-01-20 22:33 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 22:30 UTC
Synoptic Period: 2100-2400 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: 2026-01-20 22:30 UTC
Synoptic Period: 2100-2400 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: 2026-01-20 21:35 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-20 21:34 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: 2026-01-20 21:34 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.
Built 2026-01-23 20:54 from source
