Viewing archive of Tuesday, 5 August 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Aug 05 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 217 Issued at 2200Z on 05 Aug 2025IA. Analysis of Solar Active Regions and Activity from 04-2100Z to 05-2100Z Solar activity has been at moderate levels for the past 24
hours. There are currently 6 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares and a slight chance for an X-class flare on
days one, two, and three (06 Aug, 07 Aug, 08 Aug).
IIA. Geophysical Activity Summary 04-2100Z to 05-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 560 km/s at 05/0611Z. Total IMF reached 7
nT at 05/0439Z. The maximum southward component of Bz reached -6 nT at
05/0211Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 629 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (06 Aug) and quiet levels
on days two and three (07 Aug, 08 Aug).
III. Event Probabilities 06 Aug to 08 Aug
| Class M | 50% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 05 Aug 156 Predicted 06 Aug-08 Aug 145/140/140 90 Day Mean 05 Aug 134
V. Geomagnetic A Indices
Observed Afr/Ap 04 Aug 007/ NA Estimated Afr/Ap 05 Aug 008/008 Predicted Afr/Ap 06 Aug-08 Aug 008/008-006/005-006/005
VI. Geomagnetic Activity Probabilities 06 Aug to 08 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 10% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 20% |
| Major-severe storm | 25% | 25% | 20% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/09 | M1.1 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 160.6 +68.8 |
| Last 30 days | 108.7 +12.8 |