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Solar activity report
Report of Solar-Geophysical Activity 2025 Apr 23 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 113 Issued at 2200Z on 23 Apr 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 Apr, 25 Apr,
26 Apr).
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 612 km/s at 22/2220Z. Total IMF reached 7
nT at 23/1955Z. The maximum southward component of Bz reached -3 nT at
23/0919Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 690 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (24 Apr, 25 Apr) and
quiet levels on day three (26 Apr).
III. Event Probabilities 24 Apr to 26 Apr
| Class M | 40% | 40% | 40% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Apr 167 Predicted 24 Apr-26 Apr 160/165/165 90 Day Mean 23 Apr 172
V. Geomagnetic A Indices
Observed Afr/Ap 22 Apr 013/ NA Estimated Afr/Ap 23 Apr 015/017 Predicted Afr/Ap 24 Apr-26 Apr 014/018-010/012-007/008
VI. Geomagnetic Activity Probabilities 24 Apr to 26 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 15% |
| Minor storm | 15% | 15% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 25% |
| Major-severe storm | 45% | 45% | 25% |
All times in UTC
Latest news
Wednesday, 14 May 2025
Another X-flare! Potent sunspot region 4087!
Tuesday, 13 May 2025
X1.1 solar flare from sunspot region 4086
Tuesday, 15 April 2025
CME arrival, G3 storm watch
Latest forum messages
Tuesday's Filament makes the news in the UK 8AR4087 195Unspecified geomagnetic activity 2501Solar Transit, Artifacts, or Radiation 19Ask your obscure/"stupid" space weather questions. 404
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Space weather facts
| Last X-flare | 2025/05/14 | X2.7 |
| Last M-flare | 2025/05/15 | M2.1 |
| Last geomagnetic storm | 2025/05/17 | Kp6+ (G2) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2025 | 140.6 +6.4 |
| May 2025 | 69.8 -70.8 |
| Last 30 days | 94.8 -23.4 |