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Solar activity report
Report of Solar-Geophysical Activity 2025 Mar 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 89 Issued at 2200Z on 30 Mar 2025IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity has been at high levels for the past 24 hours.
There are currently 6 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 day one (31 Mar) and
expected to be low with a chance for M-class flares and a slight chance
for an X-class flare on days two and three (01 Apr, 02 Apr).
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 505 km/s at 29/2230Z. Total IMF reached 21
nT at 30/2055Z. The maximum southward component of Bz reached -5 nT at
30/0658Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 2772 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one, two, and three (31 Mar,
01 Apr, 02 Apr).
III. Event Probabilities 31 Mar to 02 Apr
| Class M | 55% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Mar 171 Predicted 31 Mar-02 Apr 170/175/175 90 Day Mean 30 Mar 180
V. Geomagnetic A Indices
Observed Afr/Ap 29 Mar 010/012 Estimated Afr/Ap 30 Mar 010/012 Predicted Afr/Ap 31 Mar-02 Apr 007/008-009/010-008/008
VI. Geomagnetic Activity Probabilities 31 Mar to 02 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 30% | 25% |
| Major-severe storm | 25% | 25% | 25% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/10 | M1.6 |
| 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 | 157.7 +65.9 |
| Last 30 days | 108.9 +11.4 |