Solar activity report
Below you'll find a daily report brought to you by the NOAA about the solar activity and auroral activity during the past day and the prediction for the coming days. This page is daily updated around midnight.
Report of Solar-Geophysical Activity 2026 Jan 31 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 31 Issued at 2200Z on 31 Jan 2026IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 10 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (01 Feb, 02 Feb,
03 Feb).
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 518 km/s at 30/2340Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 11099 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (01 Feb, 02 Feb, 03
Feb).
III. Event Probabilities 01 Feb to 03 Feb
| Class M | 35% | 35% | 35% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 31 Jan 141 Predicted 01 Feb-03 Feb 130/125/120 90 Day Mean 31 Jan 151
V. Geomagnetic A Indices
Observed Afr/Ap 30 Jan 009/010 Estimated Afr/Ap 31 Jan 005/005 Predicted Afr/Ap 01 Feb-03 Feb 005/005-005/025-005/025
VI. Geomagnetic Activity Probabilities 01 Feb to 03 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 10% | 10% | 10% |
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Space weather facts
| Last X-flare | 2026/01/18 | X1.9 |
| Last M-flare | 2026/01/21 | M3.4 |
| Last geomagnetic storm | 2026/01/28 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| Last 30 days | 119.2 +2.7 |