Viewing archive of Wednesday, 9 August 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Aug 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 221 Issued at 2200Z on 09 Aug 2023IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z 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
09/0701Z from Region 3387 (N18W0*). 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 and two (10 Aug, 11 Aug) and
likely to be low with a slight chance for an M-class flare on day three
(12 Aug).
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 483 km/s at 09/0024Z. Total IMF reached 7 nT at
09/0803Z. The maximum southward component of Bz reached -4 nT at
09/1244Z. Protons greater than 10 MeV at geosynchronous orbit reached a
peak level of 47 pfu at 09/0025Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 1772 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (10 Aug) and quiet levels on
days two and three (11 Aug, 12 Aug). Protons greater than 10 Mev have a
slight chance of crossing threshold on day one (10 Aug).
III. Event Probabilities 10 Aug to 12 Aug
| Class M | 40% | 25% | 15% |
| Class X | 05% | 05% | 01% |
| Proton | 15% | 05% | 01% |
| PCAF | yellow | ||
IV. Penticton 10.7 cm Flux
Observed 09 Aug 153 Predicted 10 Aug-12 Aug 150/150/150 90 Day Mean 09 Aug 166
V. Geomagnetic A Indices
Observed Afr/Ap 08 Aug 007/010 Estimated Afr/Ap 09 Aug 006/007 Predicted Afr/Ap 10 Aug-12 Aug 008/012-006/005-006/005
VI. Geomagnetic Activity Probabilities 10 Aug to 12 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 10% | 10% |
| Minor storm | 10% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 15% | 15% |
| Major-severe storm | 35% | 10% | 10% |
All times in UTC
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