Viewing archive of Wednesday, 28 January 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Jan 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 28 Issued at 2200Z on 28 Jan 2026IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z 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 day one (29 Jan) and expected to be low
with a slight chance for an M-class flare on days two and three (30 Jan,
31 Jan).
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic
field has been at unsettled to active levels for the past 24 hours.
Solar wind speed reached a peak of 768 km/s at 28/1010Z. Total IMF
reached 13 nT at 28/1703Z. The maximum southward component of Bz reached
-12 nT at 28/1522Z. Electrons greater than 2 MeV at geosynchronous
orbit reached a peak level of 10382 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (29 Jan) and quiet to
unsettled levels on days two and three (30 Jan, 31 Jan).
III. Event Probabilities 29 Jan to 31 Jan
| Class M | 25% | 10% | 10% |
| Class X | 05% | 01% | 01% |
| Proton | 05% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Jan 133 Predicted 29 Jan-31 Jan 130/120/110 90 Day Mean 28 Jan 150
V. Geomagnetic A Indices
Observed Afr/Ap 27 Jan 007/010 Estimated Afr/Ap 28 Jan 018/022 Predicted Afr/Ap 29 Jan-31 Jan 013/018-008/010-008/008
VI. Geomagnetic Activity Probabilities 29 Jan to 31 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 25% | 25% |
| Minor storm | 20% | 10% | 10% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 30% | 25% | 25% |
| Major-severe storm | 50% | 35% | 35% |
All times in UTC
Latest news
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Latest forum messages
Do the high-resolution sunspot counts point to more complex sunspots? 57Current Farside Activity 371Incoming & Unnumbered Active Regions 154Feb 8-9 CMEs 21AR4366 999
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Space weather facts
| Last X-flare | 2026/02/04 | X4.3 |
| Last M-flare | 2026/02/08 | M2.8 |
| Last geomagnetic storm | 2026/02/05 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| January 2026 | 112.6 -11.4 |
| February 2026 | 137.7 +25.1 |
| Last 30 days | 127.6 +24.1 |