Viewing archive of Wednesday, 8 December 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 Dec 08 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 342 Issued at 2200Z on 08 Dec 2021IA. Analysis of Solar Active Regions and Activity from 07-2100Z to 08-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 0 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
on days one, two, and three (09 Dec, 10 Dec, 11 Dec).
IIA. Geophysical Activity Summary 07-2100Z to 08-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 457 km/s at 08/1250Z. Total IMF reached 5 nT at
08/0051Z. The maximum southward component of Bz reached -3 nT at
08/0701Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 980 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one and three (09 Dec, 11 Dec) and quiet
to unsettled levels on day two (10 Dec).
III. Event Probabilities 09 Dec to 11 Dec
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 08 Dec 077 Predicted 09 Dec-11 Dec 078/080/082 90 Day Mean 08 Dec 087
V. Geomagnetic A Indices
Observed Afr/Ap 07 Dec 003/002 Estimated Afr/Ap 08 Dec 005/005 Predicted Afr/Ap 09 Dec-11 Dec 006/005-007/010-007/008
VI. Geomagnetic Activity Probabilities 09 Dec to 11 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 25% | 20% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 30% | 25% |
| Major-severe storm | 15% | 30% | 30% |
All times in UTC
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