Viewing archive of Wednesday, 23 December 2020
Solar activity report
Report of Solar-Geophysical Activity 2020 Dec 23 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 358 Issued at 2200Z on 23 Dec 2020IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 2 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a slight chance for a C-class flare on days one, two, and three (24
Dec, 25 Dec, 26 Dec).
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 644 km/s at 23/1007Z. Total IMF reached 7
nT at 23/0346Z. The maximum southward component of Bz reached -6 nT at
23/0223Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 550 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (24 Dec), quiet to
active levels on day two (25 Dec) and quiet to unsettled levels on day
three (26 Dec).
III. Event Probabilities 24 Dec to 26 Dec
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Dec 086 Predicted 24 Dec-26 Dec 086/088/088 90 Day Mean 23 Dec 083
V. Geomagnetic A Indices
Observed Afr/Ap 22 Dec 011/010 Estimated Afr/Ap 23 Dec 015/016 Predicted Afr/Ap 24 Dec-26 Dec 018/022-011/015-008/008
VI. Geomagnetic Activity Probabilities 24 Dec to 26 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 30% | 20% |
| Minor storm | 30% | 15% | 05% |
| Major-severe storm | 10% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 15% | 15% |
| Minor storm | 25% | 30% | 25% |
| Major-severe storm | 65% | 45% | 25% |
All times in UTC
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