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Solar activity report
Report of Solar-Geophysical Activity 2024 Aug 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 237 Issued at 2200Z on 24 Aug 2024IA. 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. The largest solar event of the period was a M1 event observed at
24/0014Z from Region 3796 (S04W14). There are currently 9 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare 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 to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 400 km/s at 24/0255Z. Total IMF reached 9
nT at 23/2235Z. The maximum southward component of Bz reached -6 nT at
24/0500Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 174 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one and two (25 Aug, 26 Aug) and quiet to
active levels on day three (27 Aug). Protons have a slight chance of
crossing threshold on days one, two, and three (25 Aug, 26 Aug, 27 Aug).
III. Event Probabilities 25 Aug to 27 Aug
| Class M | 70% | 70% | 70% |
| Class X | 15% | 15% | 15% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Aug 232 Predicted 25 Aug-27 Aug 240/245/245 90 Day Mean 24 Aug 207
V. Geomagnetic A Indices
Observed Afr/Ap 23 Aug 008/008 Estimated Afr/Ap 24 Aug 008/009 Predicted Afr/Ap 25 Aug-27 Aug 006/005-005/005-008/012
VI. Geomagnetic Activity Probabilities 25 Aug to 27 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 25% |
| Minor storm | 01% | 01% | 15% |
| Major-severe storm | 01% | 01% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 20% | 20% | 25% |
| Major-severe storm | 15% | 15% | 45% |
All times in UTC
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Space weather facts
| Last X-flare | 2024/09/14 | X4.54 |
| Last M-flare | 2024/09/14 | M3.0 |
| Last geomagnetic storm | 2024/09/17 | Kp8- (G4) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| August 2024 | 215.5 +19 |
| September 2024 | 151.6 -63.9 |
| Last 30 days | 159.7 -53.2 |