Viewing archive of Tuesday, 8 April 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Apr 08 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 98 Issued at 2200Z on 08 Apr 2025IA. Analysis of Solar Active Regions and Activity from 07-2100Z to 08-2100Z Solar activity has been at low 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 on days one, two, and three (09 Apr, 10 Apr,
11 Apr).
IIA. Geophysical Activity Summary 07-2100Z to 08-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 623 km/s at 08/1641Z. Total IMF
reached 11 nT at 08/1257Z. The maximum southward component of Bz reached
-11 nT at 08/1258Z. Electrons greater than 2 MeV at geosynchronous
orbit reached a peak level of 10268 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (09 Apr) and quiet to
active levels on days two and three (10 Apr, 11 Apr).
III. Event Probabilities 09 Apr to 11 Apr
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 08 Apr 159 Predicted 09 Apr-11 Apr 150/150/140 90 Day Mean 08 Apr 178
V. Geomagnetic A Indices
Observed Afr/Ap 07 Apr 010/013 Estimated Afr/Ap 08 Apr 017/025 Predicted Afr/Ap 09 Apr-11 Apr 014/015-011/012-010/012
VI. Geomagnetic Activity Probabilities 09 Apr to 11 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 30% |
| Minor storm | 20% | 15% | 15% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 25% | 30% | 30% |
| Major-severe storm | 50% | 45% | 45% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/04/24 | X2.5 |
| Last M-flare | 2026/05/17 | M1.4 |
| Last geomagnetic storm | 2026/05/16 | Kp6- (G2) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (2%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2026 | 79.3 -6.6 |
| May 2026 | 92.2 +12.9 |
| Last 30 days | 97 +6.4 |
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