Viewing archive of Friday, 14 April 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Apr 14 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 104 Issued at 2200Z on 14 Apr 2023IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z 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
14/1618Z from Region 3282 (N11E52). There are currently 8 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 (15 Apr, 16 Apr,
17 Apr).
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 412 km/s at 13/2217Z. Total IMF reached 8
nT at 14/1238Z. The maximum southward component of Bz reached -6 nT at
14/1220Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 148 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (15 Apr) and quiet to
unsettled levels on days two and three (16 Apr, 17 Apr).
III. Event Probabilities 15 Apr to 17 Apr
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 14 Apr 171 Predicted 15 Apr-17 Apr 175/180/178 90 Day Mean 14 Apr 165
V. Geomagnetic A Indices
Observed Afr/Ap 13 Apr 005/004 Estimated Afr/Ap 14 Apr 007/008 Predicted Afr/Ap 15 Apr-17 Apr 011/012-009/010-007/008
VI. Geomagnetic Activity Probabilities 15 Apr to 17 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 25% | 20% |
| Minor storm | 15% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 50% | 35% | 30% |
All times in UTC
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