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Solar activity report
Report of Solar-Geophysical Activity 2025 Mar 23 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 82 Issued at 2200Z on 23 Mar 2025IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 8 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 (24 Mar, 25 Mar,
26 Mar).
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 497 km/s at 22/2113Z. Total IMF
reached 8 nT at 23/2036Z. The maximum southward component of Bz reached
-5 nT at 22/2349Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 363 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (24 Mar), unsettled to
major storm levels on day two (25 Mar) and unsettled to minor storm
levels on day three (26 Mar).
III. Event Probabilities 24 Mar to 26 Mar
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Mar 168 Predicted 24 Mar-26 Mar 170/170/165 90 Day Mean 23 Mar 187
V. Geomagnetic A Indices
Observed Afr/Ap 22 Mar 020/028 Estimated Afr/Ap 23 Mar 021/035 Predicted Afr/Ap 24 Mar-26 Mar 015/020-022/030-015/020
VI. Geomagnetic Activity Probabilities 24 Mar to 26 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 25% | 35% |
| Minor storm | 30% | 35% | 30% |
| Major-severe storm | 15% | 25% | 15% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 20% | 15% | 20% |
| Major-severe storm | 70% | 75% | 70% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/03/28 | M1.1 |
| 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 |
| March 2025 | 130 -24.6 |
| Last 30 days | 130 -22.2 |