Viewing archive of Sunday, 21 February 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 Feb 21 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 52 Issued at 2200Z on 21 Feb 2021IA. 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 1 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 Feb, 23 Feb, 24 Feb).
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 624 km/s at 21/1236Z. Total IMF reached 7
nT at 21/0503Z. The maximum southward component of Bz reached -6 nT at
21/0726Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 6701 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (22 Feb) and quiet to
active levels on days two and three (23 Feb, 24 Feb).
III. Event Probabilities 22 Feb to 24 Feb
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 21 Feb 075 Predicted 22 Feb-24 Feb 075/075/075 90 Day Mean 21 Feb 081
V. Geomagnetic A Indices
Observed Afr/Ap 20 Feb 015/ NA Estimated Afr/Ap 21 Feb 015/021 Predicted Afr/Ap 22 Feb-24 Feb 008/010-010/012-010/012
VI. Geomagnetic Activity Probabilities 22 Feb to 24 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 30% | 30% |
| Minor storm | 05% | 15% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 30% | 30% |
| Major-severe storm | 30% | 45% | 45% |
All times in UTC
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