Viewing archive of Tuesday, 5 September 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Sep 05 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 248 Issued at 2200Z on 05 Sep 2023IA. Analysis of Solar Active Regions and Activity from 04-2100Z to 05-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M2 event observed at
05/0812Z from Region 3421 (N14W14). There are currently 8 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 (06 Sep, 07 Sep,
08 Sep).
IIA. Geophysical Activity Summary 04-2100Z to 05-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 461 km/s at 05/2057Z. Total IMF reached 10
nT at 05/1557Z. The maximum southward component of Bz reached -8 nT at
05/1756Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 1869 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (06 Sep), quiet to
active levels on day two (07 Sep) and quiet to unsettled levels on day
three (08 Sep).
III. Event Probabilities 06 Sep to 08 Sep
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 05 Sep 143 Predicted 06 Sep-08 Sep 144/142/142 90 Day Mean 05 Sep 162
V. Geomagnetic A Indices
Observed Afr/Ap 04 Sep 014/008 Estimated Afr/Ap 05 Sep 009/012 Predicted Afr/Ap 06 Sep-08 Sep 014/018-010/012-008/010
VI. Geomagnetic Activity Probabilities 06 Sep to 08 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 30% | 25% |
| Minor storm | 25% | 10% | 10% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 20% | 20% |
| Major-severe storm | 45% | 30% | 20% |
All times in UTC
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