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Solar activity report
Report of Solar-Geophysical Activity 2025 Apr 02 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 92 Issued at 2200Z on 02 Apr 2025IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z Solar activity has been at moderate levels for the past 24
hours. There are currently 8 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(03 Apr, 04 Apr, 05 Apr).
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 492 km/s at 02/0225Z. Total IMF reached 11
nT at 02/1201Z. The maximum southward component of Bz reached -9 nT at
02/0913Z. Protons greater than 10 MeV at geosynchronous orbit reached a
peak level of 26 pfu at 01/2125Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 1875 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (03 Apr) and quiet to minor
storm levels on days two and three (04 Apr, 05 Apr). Protons have a
slight chance of crossing threshold on days one, two, and three (03 Apr,
04 Apr, 05 Apr).
III. Event Probabilities 03 Apr to 05 Apr
| Class M | 70% | 70% | 70% |
| Class X | 15% | 15% | 15% |
| Proton | 15% | 15% | 15% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 02 Apr 180 Predicted 03 Apr-05 Apr 180/180/176 90 Day Mean 02 Apr 178
V. Geomagnetic A Indices
Observed Afr/Ap 01 Apr 005/ 005 Estimated Afr/Ap 02 Apr 017/021 Predicted Afr/Ap 03 Apr-05 Apr 010/012-013/018-017/020
VI. Geomagnetic Activity Probabilities 03 Apr to 05 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 40% | 40% |
| Minor storm | 05% | 25% | 25% |
| Major-severe storm | 01% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 10% |
| Minor storm | 30% | 25% | 25% |
| Major-severe storm | 25% | 60% | 60% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/04 | M6.0 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 186 +94.2 |
| Last 30 days | 106.3 +12.6 |