:Product: 1211RSGA.txt
:Issued: 2020 Dec 11 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 346 Issued at 2200Z on 11 Dec 2020

IA.  Analysis of Solar Active Regions and Activity from 10/2100Z to
11/2100Z: Solar activity has been at very high 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
with a slight chance for a C-class flare on days one, two, and three (12
Dec, 13 Dec, 14 Dec).

IIA.  Geophysical Activity Summary 10/2100Z to 11/2100Z: The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 552 km/s at 11/1315Z. Total IMF reached 6
nT at 10/2331Z. The maximum southward component of Bz reached -3 nT at
11/0204Z.  Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 203 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to unsettled levels on days one and two (12 Dec, 13 Dec)
and quiet levels on day three (14 Dec).

III.  Event probabilities 12 Dec-14 Dec
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           11 Dec 083
Predicted   12 Dec-14 Dec 084/083/083
90 Day Mean        11 Dec 081

V.  Geomagnetic A Indices
Observed Afr/Ap 10 Dec  006/004
Estimated Afr/Ap 11 Dec  007/007
Predicted Afr/Ap 12 Dec-14 Dec  007/008-008/008-006/005

VI.  Geomagnetic Activity Probabilities 12 Dec-14 Dec
A.  Middle Latitudes
Active                20/20/10
Minor Storm           05/05/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/20
Minor Storm           30/30/20
Major-severe storm    30/30/10