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Solar activity report
Report of Solar-Geophysical Activity 2025 Mar 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 85 Issued at 2200Z on 26 Mar 2025IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z Solar activity has been at moderate levels for the past 24
hours. There are currently 4 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 (27 Mar, 28 Mar,
29 Mar).
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic
field has been at quiet to major storm levels for the past 24 hours.
Solar wind speed reached a peak of 658 km/s at 26/1950Z. Total IMF
reached 24 nT at 26/1213Z. The maximum southward component of Bz reached
-22 nT at 26/1213Z. Electrons greater than 2 MeV at geosynchronous
orbit reached a peak level of 168 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at active to major storm levels on day one (27 Mar), active levels
on day two (28 Mar) and quiet to unsettled levels on day three (29 Mar).
III. Event Probabilities 27 Mar to 29 Mar
| Class M | 30% | 25% | 25% |
| Class X | 05% | 01% | 01% |
| Proton | 05% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 26 Mar 152 Predicted 27 Mar-29 Mar 155/160/160 90 Day Mean 26 Mar 184
V. Geomagnetic A Indices
Observed Afr/Ap 25 Mar 013/015 Estimated Afr/Ap 26 Mar 024/033 Predicted Afr/Ap 27 Mar-29 Mar 028/040-018/025-013/015
VI. Geomagnetic Activity Probabilities 27 Mar to 29 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 45% | 35% | 20% |
| Minor storm | 25% | 20% | 05% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 60% | 50% | 25% |
All times in UTC
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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 | 2026/01/22 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| January 2026 | 119.1 -4.9 |
| Last 30 days | 122.3 +12.7 |