Viewing archive of Thursday, 12 January 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Jan 12 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 12 Issued at 2200Z on 12 Jan 2023IA. Analysis of Solar Active Regions and Activity from 11-2100Z to 12-2100Z 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
12/1128Z from Region 3181 (S19W74). There are currently 6 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(13 Jan, 14 Jan, 15 Jan).
IIA. Geophysical Activity Summary 11-2100Z to 12-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 464 km/s at 12/1349Z. Total IMF reached 8
nT at 12/0229Z. The maximum southward component of Bz reached -8 nT at
12/1313Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 202 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (13 Jan) and quiet to unsettled levels
on days two and three (14 Jan, 15 Jan). Protons have a slight chance of
crossing threshold on day one (13 Jan) and have a slight chance of
crossing threshold on days two and three (14 Jan, 15 Jan).
III. Event Probabilities 13 Jan to 15 Jan
| Class M | 60% | 55% | 55% |
| Class X | 20% | 20% | 15% |
| Proton | 20% | 15% | 15% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 12 Jan 212 Predicted 13 Jan-15 Jan 210/210/208 90 Day Mean 12 Jan 138
V. Geomagnetic A Indices
Observed Afr/Ap 11 Jan 008/006 Estimated Afr/Ap 12 Jan 008/008 Predicted Afr/Ap 13 Jan-15 Jan 006/005-008/010-008/008
VI. Geomagnetic Activity Probabilities 13 Jan to 15 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 25% | 25% |
| Minor storm | 01% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 30% | 30% |
| Major-severe storm | 20% | 35% | 35% |
All times in UTC
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| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
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