Viewing archive of Thursday, 9 December 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 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 2021IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z 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 (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 392 km/s at 08/2108Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 1280 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one, two, and three (10 Dec,
11 Dec, 12 Dec).
III. Event Probabilities 10 Dec to 12 Dec
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Dec 077 Predicted 10 Dec-12 Dec 077/080/080 90 Day Mean 09 Dec 086
V. Geomagnetic A Indices
Observed Afr/Ap 08 Dec 004/003 Estimated Afr/Ap 09 Dec 002/003 Predicted Afr/Ap 10 Dec-12 Dec 009/010-008/008-007/010
VI. Geomagnetic Activity Probabilities 10 Dec to 12 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 25% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 25% | 30% |
| Major-severe storm | 30% | 30% | 30% |
All times in UTC
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