Viewing archive of Sunday, 4 August 2024
Solar activity report
Report of Solar-Geophysical Activity 2024 Aug 04 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 04 Aug 2024IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z Solar activity has been at high levels for the past 24 hours.
The largest solar event of the period was a M2 event observed at
04/1515Z from Region 3780 (S10E71). There are currently 10 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be moderate
with a chance for X-class flares on days one, two, and three (05 Aug, 06
Aug, 07 Aug).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic
field has been at unsettled to severe storm levels for the past 24
hours. Solar wind speed reached a peak of 498 km/s at 03/2135Z. Total
IMF reached 19 nT at 04/1251Z. The maximum southward component of Bz
reached -17 nT at 04/1249Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 109 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (05 Aug) and quiet to
unsettled levels on days two and three (06 Aug, 07 Aug). Protons have a
slight chance of crossing threshold on days one, two, and three (05 Aug,
06 Aug, 07 Aug).
III. Event Probabilities 05 Aug to 07 Aug
| Class M | 75% | 75% | 75% |
| Class X | 25% | 25% | 25% |
| Proton | 20% | 20% | 20% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 04 Aug 241 Predicted 05 Aug-07 Aug 240/240/240 90 Day Mean 04 Aug 194
V. Geomagnetic A Indices
Observed Afr/Ap 03 Aug 009/009 Estimated Afr/Ap 04 Aug 029/047 Predicted Afr/Ap 05 Aug-07 Aug 013/015-008/010-007/008
VI. Geomagnetic Activity Probabilities 05 Aug to 07 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 20% | 10% |
| Minor storm | 20% | 05% | 01% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 25% | 30% | 20% |
| Major-severe storm | 50% | 25% | 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 | 154.3 -61.2 |
| Last 30 days | 161.6 -51.3 |