Viewing archive of Friday, 10 February 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Feb 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 41 Issued at 2200Z on 10 Feb 2023IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M3 event observed at
10/0303Z from Region 3213 (N30W36). There are currently 12 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
(11 Feb, 12 Feb, 13 Feb).
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 539 km/s at 10/1949Z. Total IMF
reached 7 nT at 09/2337Z. The maximum southward component of Bz reached
-7 nT at 09/2337Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 1002 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (11 Feb) and quiet levels
on days two and three (12 Feb, 13 Feb). Protons have a slight chance of
crossing threshold on days one, two, and three (11 Feb, 12 Feb, 13 Feb).
III. Event Probabilities 11 Feb to 13 Feb
| Class M | 70% | 70% | 70% |
| Class X | 15% | 15% | 15% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 10 Feb 208 Predicted 11 Feb-13 Feb 210/210/205 90 Day Mean 10 Feb 156
V. Geomagnetic A Indices
Observed Afr/Ap 09 Feb 016/016 Estimated Afr/Ap 10 Feb 014/013 Predicted Afr/Ap 11 Feb-13 Feb 008/008-005/005-006/005
VI. Geomagnetic Activity Probabilities 11 Feb to 13 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 20% | 15% | 15% |
All times in UTC
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| Last X-flare | 2024/11/06 | X2.3 |
| Last M-flare | 2024/11/08 | M1.4 |
| Last geomagnetic storm | 2024/10/12 | Kp5 (G1) |
| Spotless days | |
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| Monthly mean Sunspot Number | |
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| October 2024 | 166.4 +25 |
| November 2024 | 190.1 +23.7 |
| Last 30 days | 160.2 +7.9 |