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Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 25 February 2021

Status Report From: Space Weather Prediction Center (NOAA)
Posted: Thursday, February 25, 2021

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 56 Issued at 2200Z on 25 Feb 2021 IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 2 numbered sunspot regions on the disk.

IB. Solar Activity Forecast: Solar activity is expected to be very low with a chance for a C-class flares on days one, two, and three (26 Feb, 27 Feb, 28 Feb). IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 503 km/s at 25/0357Z. Total IMF reached 6 nT at 24/2112Z. The maximum southward component of Bz reached -6 nT at 24/2112Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 971 pfu.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (26 Feb, 27 Feb, 28 Feb). III. Event probabilities 26 Feb-28 Feb Class M 05/05/05 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 25 Feb 080 Predicted 26 Feb-28 Feb 080/080/080 90 Day Mean 25 Feb 080 V. Geomagnetic A Indices Observed Afr/Ap 24 Feb 016/017 Estimated Afr/Ap 25 Feb 012/013 Predicted Afr/Ap 26 Feb-28 Feb 006/005-006/005-006/005 VI. Geomagnetic Activity Probabilities 26 Feb-28 Feb A. Middle Latitudes Active 05/05/05 Minor Storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 20/20/20 Major-severe storm 10/10/10


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