Viewing archive of Monday, 4 December 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Dec 04 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 338 Issued at 2200Z on 04 Dec 2023IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C8 event observed at
04/0126Z from Region 3511 (S23E11). 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 (05 Dec, 06 Dec,
07 Dec).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 581 km/s at 04/1127Z. Total IMF reached 13
nT at 04/2053Z. The maximum southward component of Bz reached -8 nT at
04/0700Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 134 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (05 Dec), quiet to
active levels on day two (06 Dec) and quiet levels on day three (07
Dec).
III. Event Probabilities 05 Dec to 07 Dec
| Class M | 30% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 04 Dec 138 Predicted 05 Dec-07 Dec 135/130/130 90 Day Mean 04 Dec 151
V. Geomagnetic A Indices
Observed Afr/Ap 03 Dec 010/008 Estimated Afr/Ap 04 Dec 014/017 Predicted Afr/Ap 05 Dec-07 Dec 014/018-011/012-007/008
VI. Geomagnetic Activity Probabilities 05 Dec to 07 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 20% | 15% |
| Minor storm | 15% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 15% | 20% |
| Major-severe storm | 20% | 10% | 10% |
All times in UTC
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