Viewing archive of Thursday, 10 August 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Aug 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 222 Issued at 2200Z on 10 Aug 2023IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C5 event observed at
10/0242Z from Region 3398 (S21W85). There are currently 6 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 (11 Aug, 12 Aug,
13 Aug).
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 484 km/s at 10/0800Z. Total IMF reached 9
nT at 10/1657Z. The maximum southward component of Bz reached -4 nT at
10/1559Z. Protons greater than 10 MeV at geosynchronous orbit reached a
peak level of 20 pfu at 09/2120Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 1708 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (11 Aug, 12 Aug, 13
Aug). Protons greater than 10 Mev have a slight chance of crossing
threshold on day one (11 Aug).
III. Event Probabilities 11 Aug to 13 Aug
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 15% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 10 Aug 156 Predicted 11 Aug-13 Aug 150/150/145 90 Day Mean 10 Aug 166
V. Geomagnetic A Indices
Observed Afr/Ap 09 Aug 008/009 Estimated Afr/Ap 10 Aug 007/008 Predicted Afr/Ap 11 Aug-13 Aug 006/005-006/005-005/005
VI. Geomagnetic Activity Probabilities 11 Aug to 13 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 10% | 10% | 10% |
All times in UTC
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| Last geomagnetic storm | 2024/10/12 | Kp5 (G1) |
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