Viewing archive of Friday, 22 December 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Dec 22 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 356 Issued at 2200Z on 22 Dec 2023IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M3 event observed at
22/0004Z from Region 3519 (S10W86). There are currently 10 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 (23 Dec, 24 Dec,
25 Dec).
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 381 km/s at 22/0154Z. Total IMF reached 6 nT at
22/0826Z. The maximum southward component of Bz reached -4 nT at
22/0748Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 1867 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (23 Dec), quiet to unsettled
levels on day two (24 Dec) and quiet levels on day three (25 Dec).
III. Event Probabilities 23 Dec to 25 Dec
| Class M | 35% | 25% | 25% |
| Class X | 05% | 01% | 01% |
| Proton | 05% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 22 Dec 187 Predicted 23 Dec-25 Dec 185/185/180 90 Day Mean 22 Dec 150
V. Geomagnetic A Indices
Observed Afr/Ap 21 Dec 003/004 Estimated Afr/Ap 22 Dec 004/004 Predicted Afr/Ap 23 Dec-25 Dec 010/012-008/008-006/005
VI. Geomagnetic Activity Probabilities 23 Dec to 25 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 10% | 05% |
| Minor storm | 10% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 25% | 20% | 10% |
All times in UTC
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