Viewing archive of Thursday, 1 April 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 Apr 01 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 91 Issued at 2200Z on 01 Apr 2021IA. Analysis of Solar Active Regions and Activity from 31-2100Z to 01-2100Z 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 (02 Apr, 03 Apr, 04 Apr).
IIA. Geophysical Activity Summary 31-2100Z to 01-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 433 km/s at 01/0521Z. Total IMF reached 7
nT at 31/2239Z. The maximum southward component of Bz reached -6 nT at
31/2243Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 273 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (02 Apr, 03 Apr, 04
Apr).
III. Event Probabilities 02 Apr to 04 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 01 Apr 078 Predicted 02 Apr-04 Apr 073/073/071 90 Day Mean 01 Apr 076
V. Geomagnetic A Indices
Observed Afr/Ap 31 Mar 007/007 Estimated Afr/Ap 01 Apr 008/008 Predicted Afr/Ap 02 Apr-04 Apr 005/005-005/005-006/005
VI. Geomagnetic Activity Probabilities 02 Apr to 04 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 20% | 25% | 25% |
| Major-severe storm | 10% | 20% | 20% |
All times in UTC
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