:Product: 1028RSGA.txt
:Issued: 2026 Oct 28 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 301 Issued at 2200Z on 28 Oct 2026

IA.  Analysis of Solar Active Regions and Activity from 27/2100Z to
28/2100Z: Solar activity has been at very low 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 chance for a C-class flares on days one, two, and three (29 Oct,
30 Oct, 31 Oct).

IIA.  Geophysical Activity Summary 27/2100Z to 28/2100Z: The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 430 km/s at 28/1152Z. Total IMF reached 8 nT at
28/0622Z. The maximum southward component of Bz reached -6 nT at
28/0526Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 2493 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet levels on day one (29 Oct), quiet to active levels on day
two (30 Oct) and unsettled to minor storm levels on day three (31 Oct).

III.  Event probabilities 29 Oct-31 Oct
Class M    05/05/05
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           28 Oct 093
Predicted   29 Oct-31 Oct 92/95/95
90 Day Mean        28 Oct 111

V.  Geomagnetic A Indices
Observed Afr/Ap 27 Oct  006/006
Estimated Afr/Ap 28 Oct  006/006
Predicted Afr/Ap 29 Oct-31 Oct  006/005-010/012-021/028

VI.  Geomagnetic Activity Probabilities 29 Oct-31 Oct
A.  Middle Latitudes
Active                10/30/40
Minor Storm           05/15/35
Major-severe storm    01/01/10
B.  High Latitudes
Active                15/15/05
Minor Storm           15/30/25
Major-severe storm    15/40/70