:Product: 0120RSGA.txt
:Issued: 2021 Jan 20 2200 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
# Space Weather Prediction Center and the U.S. Air Force.
#
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 20 Issued at 2200Z on 20 Jan 2021

IA.  Analysis of Solar Active Regions and Activity from 19/2100Z to
20/2100Z: Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C1 event observed at
20/1253Z from Region 2798 (S17E51). 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 (21 Jan,
22 Jan, 23 Jan).

IIA.  Geophysical Activity Summary 19/2100Z to 20/2100Z: The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 414 km/s at 20/0141Z. Total IMF reached 8
nT at 19/2142Z. The maximum southward component of Bz reached -7 nT at
20/0604Z.  Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 187 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to active levels on day one (21 Jan), quiet to unsettled
levels on day two (22 Jan) and quiet levels on day three (23 Jan).

III.  Event probabilities 21 Jan-23 Jan
Class M    05/05/05
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           20 Jan 077
Predicted   21 Jan-23 Jan 080/080/080
90 Day Mean        20 Jan 085

V.  Geomagnetic A Indices
Observed Afr/Ap 19 Jan  006/003
Estimated Afr/Ap 20 Jan  011/012
Predicted Afr/Ap 21 Jan-23 Jan  011/014-009/010-007/008

VI.  Geomagnetic Activity Probabilities 21 Jan-23 Jan
A.  Middle Latitudes
Active                35/30/20
Minor Storm           10/05/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/20
Minor Storm           30/30/30
Major-severe storm    45/35/25