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Solar activity report
Report of Solar-Geophysical Activity 2023 Apr 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 100 Issued at 2200Z on 10 Apr 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 M2 event observed at
10/0520Z from Region 3276 (S22E75). There are currently 5 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (11 Apr, 12 Apr,
13 Apr).
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 562 km/s at 10/1314Z. Total IMF reached 13
nT at 10/0744Z. The maximum southward component of Bz reached -8 nT at
10/0626Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 832 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to active levels on day one (11 Apr), quiet to active
levels on day two (12 Apr) and quiet to unsettled levels on day three
(13 Apr).
III. Event Probabilities 11 Apr to 13 Apr
| Class M | 35% | 35% | 35% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 10 Apr 140 Predicted 11 Apr-13 Apr 145/150/150 90 Day Mean 10 Apr 167
V. Geomagnetic A Indices
Observed Afr/Ap 09 Apr 005/005 Estimated Afr/Ap 10 Apr 012/014 Predicted Afr/Ap 11 Apr-13 Apr 015/016-011/014-008/008
VI. Geomagnetic Activity Probabilities 11 Apr to 13 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 25% |
| Minor storm | 15% | 15% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 25% |
| Major-severe storm | 45% | 45% | 30% |
All times in UTC
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