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Solar activity report
Report of Solar-Geophysical Activity 2025 Mar 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 88 Issued at 2200Z on 29 Mar 2025IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z Solar activity has been at moderate levels for the past 24
hours. There are currently 7 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares and a slight chance for an X-class flare on
days one, two, and three (30 Mar, 31 Mar, 01 Apr).
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 634 km/s at 29/0117Z. Total IMF reached 7
nT at 29/1552Z. The maximum southward component of Bz reached -4 nT at
28/2100Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 2967 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (30 Mar), quiet levels on day
two (31 Mar) and quiet to unsettled levels on day three (01 Apr).
III. Event Probabilities 30 Mar to 01 Apr
| Class M | 40% | 40% | 40% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 29 Mar 157 Predicted 30 Mar-01 Apr 160/165/170 90 Day Mean 29 Mar 180
V. Geomagnetic A Indices
Observed Afr/Ap 28 Mar 013/016 Estimated Afr/Ap 29 Mar 009/011 Predicted Afr/Ap 30 Mar-01 Apr 012/012-006/005-009/010
VI. Geomagnetic Activity Probabilities 30 Mar to 01 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 10% | 15% |
| Minor storm | 15% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 15% |
| Minor storm | 25% | 20% | 25% |
| Major-severe storm | 45% | 10% | 25% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/01 | M2.4 |
| Last geomagnetic storm | 2025/03/27 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2025 | 154.6 +17.6 |
| April 2025 | 147 -7.6 |
| Last 30 days | 128.8 -21.8 |