Viewing archive of Friday, 11 August 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Aug 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 223 Issued at 2200Z on 11 Aug 2023IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C8 event observed at
11/0656Z from Region 3395 (N13W31). There are currently 7 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 (12 Aug, 13 Aug,
14 Aug).
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 541 km/s at 10/2221Z. Total IMF reached 7 nT at
11/1653Z. The maximum southward component of Bz reached -4 nT at
11/1535Z. Protons greater than 10 MeV at geosynchronous orbit reached a
peak level of 3 pfu at 10/2110Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 1386 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one and two (12 Aug, 13 Aug) and quiet to
unsettled levels on day three (14 Aug). Protons greater than 10 Mev have
a slight chance of crossing threshold on day one (12 Aug).
III. Event Probabilities 12 Aug to 14 Aug
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 15% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 11 Aug 153 Predicted 12 Aug-14 Aug 150/145/140 90 Day Mean 11 Aug 166
V. Geomagnetic A Indices
Observed Afr/Ap 10 Aug 008/008 Estimated Afr/Ap 11 Aug 006/005 Predicted Afr/Ap 12 Aug-14 Aug 006/005-005/005-007/008
VI. Geomagnetic Activity Probabilities 12 Aug to 14 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 15% | 15% | 20% |
| Major-severe storm | 10% | 10% | 15% |
All times in UTC
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