Viewing archive of Tuesday, 15 August 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Aug 15 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 227 Issued at 2200Z on 15 Aug 2023IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C4 event observed at
15/0657Z from Region 3395 (N12W87). There are currently 7 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 (16
Aug, 17 Aug, 18 Aug).
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 336 km/s at 15/0327Z. Total IMF reached 7 nT at
15/1717Z. The maximum southward component of Bz reached -4 nT at
15/1717Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 899 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (16 Aug, 17 Aug) and
quiet to unsettled levels on day three (18 Aug).
III. Event Probabilities 16 Aug to 18 Aug
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 15 Aug 158 Predicted 16 Aug-18 Aug 160/160/155 90 Day Mean 15 Aug 167
V. Geomagnetic A Indices
Observed Afr/Ap 14 Aug 006/006 Estimated Afr/Ap 15 Aug 005/005 Predicted Afr/Ap 16 Aug-18 Aug 009/012-014/015-010/012
VI. Geomagnetic Activity Probabilities 16 Aug to 18 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 35% | 20% |
| Minor storm | 05% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 15% | 15% |
| Minor storm | 25% | 20% | 20% |
| Major-severe storm | 20% | 30% | 20% |
All times in UTC
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