Solar activity report
Below you'll find a daily report brought to you by the NOAA about the solar activity and auroral activity during the past day and the prediction for the coming days. This page is daily updated around midnight.
Report of Solar-Geophysical Activity 2025 Apr 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 115 Issued at 2200Z on 25 Apr 2025IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z
Solar activity has been at low levels for the past 24 hours.
There are currently 12 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 (26 Apr, 27 Apr,
28 Apr).
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 593 km/s at 25/0334Z. Total IMF reached 7 nT at
24/2115Z. The maximum southward component of Bz reached -2 nT at
24/2113Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 718 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (26 Apr), quiet to active levels on day
two (27 Apr) and quiet to unsettled levels on day three (28 Apr).
III. Event Probabilities 26 Apr to 28 Apr
| Class M | 40% | 40% | 40% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Apr 164 Predicted 26 Apr-28 Apr 170/170/165 90 Day Mean 25 Apr 171
V. Geomagnetic A Indices
Observed Afr/Ap 24 Apr 014/013 Estimated Afr/Ap 25 Apr 005/005 Predicted Afr/Ap 26 Apr-28 Apr 007/008-013/015-010/012
VI. Geomagnetic Activity Probabilities 26 Apr to 28 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 35% | 30% |
| Minor storm | 05% | 15% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 30% | 30% |
| Major-severe storm | 25% | 50% | 45% |
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Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/22 | M1.3 |
| Last geomagnetic storm | 2025/04/21 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2025 | 134.2 -20.4 |
| April 2025 | 124.6 -9.6 |
| Last 30 days | 121.2 -9.9 |