:Product: 0907RSGA.txt
:Issued: 2021 Sep 07 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 250 Issued at 2200Z on 07 Sep 2021

IA.  Analysis of Solar Active Regions and Activity from 06/2100Z to
07/2100Z: Solar activity has been at very low levels for the past 24
hours. There are currently 4 numbered sunspot regions on the disk.
IB.  Solar Activity Forecast: Solar activity is likely to be low with a
slight chance for an M-class flare on days one, two, and three (08 Sep,
09 Sep, 10 Sep).

IIA.  Geophysical Activity Summary 06/2100Z to 07/2100Z: The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 389 km/s at 07/1957Z. Total IMF reached 10
nT at 07/1342Z. The maximum southward component of Bz reached -7 nT at
07/2050Z.  Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 1479 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to unsettled levels on day one (08 Sep) and quiet levels
on days two and three (09 Sep, 10 Sep).

III.  Event probabilities 08 Sep-10 Sep
Class M    15/15/15
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           07 Sep 101
Predicted   08 Sep-10 Sep 100/100/100
90 Day Mean        07 Sep 080

V.  Geomagnetic A Indices
Observed Afr/Ap 06 Sep  008/007
Estimated Afr/Ap 07 Sep  007/007
Predicted Afr/Ap 08 Sep-10 Sep  008/008-006/005-006/005

VI.  Geomagnetic Activity Probabilities 08 Sep-10 Sep
A.  Middle Latitudes
Active                15/10/10
Minor Storm           01/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor Storm           25/20/20
Major-severe storm    20/20/20