Viewing archive of Friday, 19 February 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 Feb 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 50 Issued at 2200Z on 19 Feb 2021IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z 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 (20 Feb, 21 Feb, 22 Feb).
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 539 km/s at 19/2037Z. Total IMF reached 14
nT at 19/1959Z. The maximum southward component of Bz reached -10 nT at
19/2034Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 202 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (20 Feb), quiet to
active levels on day two (21 Feb) and quiet to unsettled levels on day
three (22 Feb).
III. Event Probabilities 20 Feb to 22 Feb
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Feb 073 Predicted 20 Feb-22 Feb 073/073/073 90 Day Mean 19 Feb 082
V. Geomagnetic A Indices
Observed Afr/Ap 18 Feb 002/002 Estimated Afr/Ap 19 Feb 012/016 Predicted Afr/Ap 20 Feb-22 Feb 015/018-009/012-008/010
VI. Geomagnetic Activity Probabilities 20 Feb to 22 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 20% |
| Minor storm | 15% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 25% | 30% | 25% |
| Major-severe storm | 50% | 40% | 30% |
All times in UTC
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