Viewing archive of Saturday, 17 December 2022
Solar activity report
Report of Solar-Geophysical Activity 2022 Dec 17 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 351 Issued at 2200Z on 17 Dec 2022IA. Analysis of Solar Active Regions and Activity from 16-2100Z to 17-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
17/1953Z from Region 3169 (N20E69). There are currently 9 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares and a slight chance for an X-class flare on
days one, two, and three (18 Dec, 19 Dec, 20 Dec).
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 396 km/s at 17/0615Z. Total IMF reached 6 nT at
17/1841Z. The maximum southward component of Bz reached -2 nT at
17/0644Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 189 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one, two, and three (18 Dec,
19 Dec, 20 Dec). Protons have a slight chance of crossing threshold on
days one, two, and three (18 Dec, 19 Dec, 20 Dec).
III. Event Probabilities 18 Dec to 20 Dec
| Class M | 50% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 17 Dec 155 Predicted 18 Dec-20 Dec 155/153/150 90 Day Mean 17 Dec 133
V. Geomagnetic A Indices
Observed Afr/Ap 16 Dec NA/003 Estimated Afr/Ap 17 Dec 002/003 Predicted Afr/Ap 18 Dec-20 Dec 009/010-006/008-007/008
VI. Geomagnetic Activity Probabilities 18 Dec to 20 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 05% | 15% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 15% | 25% |
| Major-severe storm | 20% | 10% | 20% |
All times in UTC
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