:Product: 0808RSGA.txt
:Issued: 2026 Aug 08 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 220 Issued at 2200Z on 08 Aug 2026

IA.  Analysis of Solar Active Regions and Activity from 07/2100Z to
08/2100Z: Solar activity has been at very low levels for the past 24
hours. There are currently 5 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 (09 Aug,
10 Aug, 11 Aug).

IIA.  Geophysical Activity Summary 07/2100Z to 08/2100Z: The geomagnetic
field has been at quiet to major storm levels for the past 24 hours.
Solar wind speed reached a peak of 374 km/s at 08/1638Z. Total IMF
reached 19 nT at 08/0751Z. The maximum southward component of Bz reached
-18 nT at 08/1143Z.  Electrons greater than 2 MeV at geosynchronous
orbit reached a peak level of 472 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to active levels on days one and three (09 Aug, 11 Aug)
and quiet to unsettled levels on day two (10 Aug).

III.  Event probabilities 09 Aug-11 Aug
Class M    05/05/05
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           08 Aug 094
Predicted   09 Aug-11 Aug 090/090/090
90 Day Mean        08 Aug 131

V.  Geomagnetic A Indices
Observed Afr/Ap 07 Aug  005/004
Estimated Afr/Ap 08 Aug  019/027
Predicted Afr/Ap 09 Aug-11 Aug  012/015-008/008-009/012

VI.  Geomagnetic Activity Probabilities 09 Aug-11 Aug
A.  Middle Latitudes
Active                20/15/25
Minor Storm           05/05/10
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor Storm           20/20/25
Major-severe storm    30/20/35