Viewing archive of Sunday, 24 August 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Aug 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 236 Issued at 2200Z on 24 Aug 2025IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z Solar activity has been at moderate 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 (25 Aug, 26 Aug,
27 Aug).
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 455 km/s at 24/0531Z. Total IMF reached 9 nT at
24/1808Z. The maximum southward component of Bz reached -4 nT at
24/1754Z. Protons greater than 10 MeV at geosynchronous orbit reached a
peak level of 6 pfu at 24/1945Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 1495 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (25 Aug, 26 Aug) and
quiet to unsettled levels on day three (27 Aug). Protons greater than 10
Mev have a chance of crossing threshold on days one and two (25 Aug, 26
Aug).
III. Event Probabilities 25 Aug to 27 Aug
| Class M | 45% | 45% | 45% |
| Class X | 05% | 05% | 05% |
| Proton | 50% | 50% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Aug 152 Predicted 25 Aug-27 Aug 152/152/155 90 Day Mean 24 Aug 136
V. Geomagnetic A Indices
Observed Afr/Ap 23 Aug 007/007 Estimated Afr/Ap 24 Aug 006/005 Predicted Afr/Ap 25 Aug-27 Aug 010/012-011/015-009/008
VI. Geomagnetic Activity Probabilities 25 Aug to 27 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 40% | 20% |
| Minor storm | 15% | 15% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 50% | 55% | 25% |
All times in UTC
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