Viewing archive of Friday, 21 August 2020
Solar activity report
Report of Solar-Geophysical Activity 2020 Aug 21 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 234 Issued at 2200Z on 21 Aug 2020IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z 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 (22 Aug, 23 Aug, 24 Aug).
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 331 km/s at 21/0805Z. Total IMF reached 5 nT at
21/2004Z. The maximum southward component of Bz reached -4 nT at
21/2004Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 149 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (22 Aug) and quiet to unsettled levels
on days two and three (23 Aug, 24 Aug).
III. Event Probabilities 22 Aug to 24 Aug
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 21 Aug 071 Predicted 22 Aug-24 Aug 070/069/069 90 Day Mean 21 Aug 070
V. Geomagnetic A Indices
Observed Afr/Ap 20 Aug 004/003 Estimated Afr/Ap 21 Aug 003/004 Predicted Afr/Ap 22 Aug-24 Aug 006/005-007/006-006/006
VI. Geomagnetic Activity Probabilities 22 Aug to 24 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 20% | 25% | 25% |
| Major-severe storm | 10% | 20% | 20% |
All times in UTC
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