Viewing archive of Tuesday, 13 August 2024
Solar activity report
Report of Solar-Geophysical Activity 2024 Aug 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 226 Issued at 2200Z on 13 Aug 2024IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z 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
12/2257Z from Region 3784 (N15E21). 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 (14 Aug, 15
Aug, 16 Aug).
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic
field has been at quiet to major storm levels for the past 24 hours.
Solar wind speed reached a peak of 478 km/s at 12/2151Z. Total IMF
reached 21 nT at 13/0358Z. The maximum southward component of Bz reached
-8 nT at 12/2100Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 119 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (14 Aug, 15 Aug, 16
Aug). Protons have a slight chance of crossing threshold on day one (14
Aug) and have a slight chance of crossing threshold on days two and
three (15 Aug, 16 Aug).
III. Event Probabilities 14 Aug to 16 Aug
| Class M | 75% | 75% | 75% |
| Class X | 25% | 25% | 25% |
| Proton | 15% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 13 Aug 260 Predicted 14 Aug-16 Aug 270/270/270 90 Day Mean 13 Aug 201
V. Geomagnetic A Indices
Observed Afr/Ap 12 Aug 051/123 Estimated Afr/Ap 13 Aug 016/021 Predicted Afr/Ap 14 Aug-16 Aug 007/008-006/005-007/008
VI. Geomagnetic Activity Probabilities 14 Aug to 16 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 15% |
| Minor storm | 05% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 20% | 15% | 20% |
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 |