Viewing archive of Wednesday, 31 March 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 Mar 31 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 90 Issued at 2200Z on 31 Mar 2021IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 0 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
on days one, two, and three (01 Apr, 02 Apr, 03 Apr).
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 410 km/s at 30/2110Z. Total IMF reached 8
nT at 31/0755Z. The maximum southward component of Bz reached -6 nT at
31/0611Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 737 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (01 Apr, 02 Apr, 03
Apr).
III. Event Probabilities 01 Apr to 03 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 31 Mar 074 Predicted 01 Apr-03 Apr 075/070/070 90 Day Mean 31 Mar 076
V. Geomagnetic A Indices
Observed Afr/Ap 30 Mar 004/002 Estimated Afr/Ap 31 Mar 009/010 Predicted Afr/Ap 01 Apr-03 Apr 006/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 01 Apr to 03 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 20% |
| Minor storm | 15% | 20% | 25% |
| Major-severe storm | 05% | 10% | 20% |
All times in UTC
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