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W7EES > SWPC 01.03.20 23:28l 61 Lines 2347 Bytes #999 (0) @ WW
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Subj: Solar-Geophysical Activity
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Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 52 Issued at 2200Z on 21 Feb 2020
IA. 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 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 558 km/s at 21/0821Z. Total IMF reached 8
nT at 20/2321Z. The maximum southward component of Bz reached -7 nT at
20/2321Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 2852 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to unsettled levels on day one (22 Feb) and quiet levels
on days two and three (23 Feb, 24 Feb).
III. Event probabilities 22 Feb-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 071
Predicted 22 Feb-24 Feb 071/071/071
90 Day Mean 21 Feb 071
V. Geomagnetic A Indices
Observed Afr/Ap 20 Feb 005/006
Estimated Afr/Ap 21 Feb 013/014
Predicted Afr/Ap 22 Feb-24 Feb 008/008-005/005-006/005
VI. Geomagnetic Activity Probabilities 22 Feb-24 Feb
A. Middle Latitudes
Active 20/10/10
Minor Storm 05/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 15/15/15
Minor Storm 25/20/20
Major-severe storm 25/10/10
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