Viewing archive of Thursday, 13 April 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Apr 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 103 Issued at 2200Z on 13 Apr 2023IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C8 event observed at
13/1043Z from Region 3279 (S20E51). 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 on days one, two, and three (14 Apr, 15 Apr,
16 Apr).
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 434 km/s at 13/0408Z. Total IMF reached 8
nT at 13/0159Z. The maximum southward component of Bz reached -6 nT at
13/0204Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 132 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and three (14 Apr, 16
Apr) and quiet to active levels on day two (15 Apr).
III. Event Probabilities 14 Apr to 16 Apr
| Class M | 45% | 45% | 45% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 13 Apr 160 Predicted 14 Apr-16 Apr 168/168/168 90 Day Mean 13 Apr 166
V. Geomagnetic A Indices
Observed Afr/Ap 12 Apr 004/004 Estimated Afr/Ap 13 Apr 005/006 Predicted Afr/Ap 14 Apr-16 Apr 007/008-011/012-009/010
VI. Geomagnetic Activity Probabilities 14 Apr to 16 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 35% | 25% |
| Minor storm | 05% | 15% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 15% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 30% | 50% | 35% |
All times in UTC
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