Viewing archive of Thursday, 10 April 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Apr 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 100 Issued at 2200Z on 10 Apr 2025IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z 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 (11 Apr, 12 Apr,
13 Apr).
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 556 km/s at 09/2330Z. Total IMF reached 8
nT at 09/2131Z. The maximum southward component of Bz reached -8 nT at
09/2127Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 3319 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one, two, and three (11 Apr, 12
Apr, 13 Apr).
III. Event Probabilities 11 Apr to 13 Apr
| Class M | 45% | 45% | 45% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 10 Apr 153 Predicted 11 Apr-13 Apr 155/155/150 90 Day Mean 10 Apr 178
V. Geomagnetic A Indices
Observed Afr/Ap 09 Apr 020/ 22 Estimated Afr/Ap 10 Apr 012/014 Predicted Afr/Ap 11 Apr-13 Apr 011/004-016/004-012/004
VI. Geomagnetic Activity Probabilities 11 Apr to 13 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 35% | 30% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 45% | 50% | 45% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/15 | M1.2 |
| Last geomagnetic storm | 2025/04/15 | Kp6+ (G2) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2025 | 134.2 -20.4 |
| April 2025 | 124.1 -10.1 |
| Last 30 days | 124.7 -16.6 |