Viewing archive of Friday, 20 January 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Jan 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 20 Issued at 2200Z on 20 Jan 2023IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C6 event observed at
20/0152Z from Region 3190 (S15W18). There are currently 11 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
(21 Jan, 22 Jan, 23 Jan).
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 1032 km/s at 20/0819Z. Total IMF reached 33
nT at 20/0536Z. The maximum southward component of Bz reached -7 nT at
20/1331Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 223 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (21 Jan, 22 Jan) and
quiet to unsettled levels on day three (23 Jan). Protons have a slight
chance of crossing threshold on days one, two, and three (21 Jan, 22
Jan, 23 Jan).
III. Event Probabilities 21 Jan to 23 Jan
| Class M | 60% | 60% | 55% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Jan 218 Predicted 21 Jan-23 Jan 215/210/210 90 Day Mean 20 Jan 147
V. Geomagnetic A Indices
Observed Afr/Ap 19 Jan 006/006 Estimated Afr/Ap 20 Jan 008/011 Predicted Afr/Ap 21 Jan-23 Jan 009/012-011/008-008/005
VI. Geomagnetic Activity Probabilities 21 Jan to 23 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 15% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 20% |
| Minor storm | 30% | 25% | 25% |
| Major-severe storm | 30% | 35% | 20% |
All times in UTC
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Space weather facts
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| Last M-flare | 2024/05/19 | M1.6 |
| Last geomagnetic storm | 2024/05/17 | Kp6 (G2) |
| Spotless days | |
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| Monthly mean Sunspot Number | |
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