Viewing archive of Wednesday, 16 August 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Aug 16 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 228 Issued at 2200Z on 16 Aug 2023IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C2 event observed at
15/2152Z from Region 3405 (N10E65). There are currently 9 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a slight chance for an M-class flare on days one, two, and three (17
Aug, 18 Aug, 19 Aug).
IIA. Geophysical Activity Summary 15-2100Z to 16-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 332 km/s at 16/1413Z. Total IMF reached 9
nT at 16/1910Z. The maximum southward component of Bz reached -8 nT at
16/1304Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 732 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (17 Aug), quiet to unsettled
levels on day two (18 Aug) and quiet levels on day three (19 Aug).
III. Event Probabilities 17 Aug to 19 Aug
| Class M | 15% | 15% | 15% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 16 Aug 160 Predicted 17 Aug-19 Aug 160/160/160 90 Day Mean 16 Aug 167
V. Geomagnetic A Indices
Observed Afr/Ap 15 Aug 007/004 Estimated Afr/Ap 16 Aug 008/010 Predicted Afr/Ap 17 Aug-19 Aug 014/015-010/012-007/008
VI. Geomagnetic Activity Probabilities 17 Aug to 19 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 20% | 15% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 30% | 20% | 20% |
All times in UTC
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