Viewing archive of Saturday, 9 December 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Dec 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 343 Issued at 2200Z on 09 Dec 2023IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z Solar activity has been at high levels for the past 24 hours.
The largest solar event of the period was a M5 event observed at
08/2307Z from Region 3511 (S22W45). There are currently 8 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(10 Dec, 11 Dec, 12 Dec).
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 467 km/s at 09/1333Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 1133 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (10 Dec) and quiet to unsettled levels
on days two and three (11 Dec, 12 Dec). Protons have a slight chance of
crossing threshold on days one, two, and three (10 Dec, 11 Dec, 12 Dec).
III. Event Probabilities 10 Dec to 12 Dec
| Class M | 55% | 55% | 55% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Dec 128 Predicted 10 Dec-12 Dec 128/125/120 90 Day Mean 09 Dec 150
V. Geomagnetic A Indices
Observed Afr/Ap 08 Dec 004/003 Estimated Afr/Ap 09 Dec 003/003 Predicted Afr/Ap 10 Dec-12 Dec 005/005-011/012-011/012
VI. Geomagnetic Activity Probabilities 10 Dec to 12 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 15% | 15% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 15% | 20% | 20% |
| Major-severe storm | 05% | 10% | 10% |
All times in UTC
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