Viewing archive of Wednesday, 7 April 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 Apr 07 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 97 Issued at 2200Z on 07 Apr 2021IA. Analysis of Solar Active Regions and Activity from 06-2100Z to 07-2100Z 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 (08 Apr, 09 Apr, 10 Apr).
IIA. Geophysical Activity Summary 06-2100Z to 07-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 524 km/s at 07/1759Z. Total IMF
reached 15 nT at 07/1142Z. The maximum southward component of Bz reached
-13 nT at 07/1347Z. Electrons greater than 2 MeV at geosynchronous
orbit reached a peak level of 151 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and three (08 Apr, 10 Apr)
and quiet to unsettled levels on day two (09 Apr).
III. Event Probabilities 08 Apr to 10 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 07 Apr 076 Predicted 08 Apr-10 Apr 074/072/072 90 Day Mean 07 Apr 076
V. Geomagnetic A Indices
Observed Afr/Ap 06 Apr 003/003 Estimated Afr/Ap 07 Apr 012/018 Predicted Afr/Ap 08 Apr-10 Apr 010/010-007/008-010/012
VI. Geomagnetic Activity Probabilities 08 Apr to 10 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 20% | 30% |
| Minor storm | 15% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 15% |
| Minor storm | 30% | 25% | 20% |
| Major-severe storm | 40% | 20% | 30% |
All times in UTC
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