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Solar activity report
Report of Solar-Geophysical Activity 2024 Aug 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 239 Issued at 2200Z on 26 Aug 2024IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z 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
26/1141Z from Region 3796 (S04W40). There are currently 10 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
(27 Aug, 28 Aug, 29 Aug).
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 498 km/s at 26/0221Z. Total IMF reached 5 nT at
26/0715Z. The maximum southward component of Bz reached -4 nT at
26/1352Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 191 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (27 Aug, 28 Aug) and
quiet levels on day three (29 Aug). Protons have a slight chance of
crossing threshold on days one, two, and three (27 Aug, 28 Aug, 29 Aug).
III. Event Probabilities 27 Aug to 29 Aug
| Class M | 70% | 70% | 60% |
| Class X | 20% | 20% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 26 Aug 232 Predicted 27 Aug-29 Aug 230/235/242 90 Day Mean 26 Aug 208
V. Geomagnetic A Indices
Observed Afr/Ap 25 Aug 008/006 Estimated Afr/Ap 26 Aug 006/006 Predicted Afr/Ap 27 Aug-29 Aug 008/012-011/012-006/005
VI. Geomagnetic Activity Probabilities 27 Aug to 29 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 10% |
| Minor storm | 15% | 15% | 01% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 25% | 25% | 20% |
| Major-severe storm | 45% | 45% | 15% |
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 |