:Product: 0721RSGA.txt
:Issued: 2024 Jul 21 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 203 Issued at 2200Z on 21 Jul 2024

IA.  Analysis of Solar Active Regions and Activity from 20/2100Z to
21/2100Z: Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
21/0834Z from Region 3751 (S08W28). There are currently 12 numbered
sunspot regions on the disk.
IB.  Solar Activity Forecast: Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(22 Jul, 23 Jul, 24 Jul).

IIA.  Geophysical Activity Summary 20/2100Z to 21/2100Z: The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 353 km/s at 21/1434Z. Total IMF reached 5 nT at
21/1537Z. The maximum southward component of Bz reached -4 nT at
21/1613Z.  Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 125 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to unsettled levels on day one (22 Jul) and quiet levels
on days two and three (23 Jul, 24 Jul). Protons have a slight chance of
crossing threshold on days one, two, and three (22 Jul, 23 Jul, 24 Jul).

III.  Event probabilities 22 Jul-24 Jul
Class M    60/60/60
Class X    15/15/15
Proton     15/15/15
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           21 Jul 198
Predicted   22 Jul-24 Jul 195/190/190
90 Day Mean        21 Jul 187

V.  Geomagnetic A Indices
Observed Afr/Ap 20 Jul  008/007
Estimated Afr/Ap 21 Jul  005/005
Predicted Afr/Ap 22 Jul-24 Jul  008/005-006/005-006/005

VI.  Geomagnetic Activity Probabilities 22 Jul-24 Jul
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    25/15/15