:Product: 1031RSGA.txt
:Issued: 2026 Oct 31 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 304 Issued at 2200Z on 31 Oct 2026

IA.  Analysis of Solar Active Regions and Activity from 30/2100Z to
31/2100Z: Solar activity has been at very low levels for the past 24
hours. There are currently 2 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 (01 Nov,
02 Nov, 03 Nov).

IIA.  Geophysical Activity Summary 30/2100Z to 31/2100Z: The geomagnetic
field has been at unsettled to major storm levels for the past 24 hours.
Solar wind speed reached a peak of 597 km/s at 31/1803Z. Total IMF
reached 13 nT at 31/1514Z. The maximum southward component of Bz reached
-11 nT at 31/1735Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 562 pfu at 31/1710Z.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (01 Nov), quiet to
unsettled levels on day two (02 Nov) and quiet levels on day three (03
Nov).

III.  Event probabilities 01 Nov-03 Nov
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           31 Oct 092
Predicted   01 Nov-03 Nov 90/95/100
90 Day Mean        31 Oct 110

V.  Geomagnetic A Indices
Observed Afr/Ap 30 Oct  009/010
Estimated Afr/Ap 31 Oct  017/027
Predicted Afr/Ap 01 Nov-03 Nov  016/020-007/010-005/005

VI.  Geomagnetic Activity Probabilities 01 Nov-03 Nov
A.  Middle Latitudes
Active                35/20/10
Minor Storm           30/05/01
Major-severe storm    10/01/01
B.  High Latitudes
Active                10/20/20
Minor Storm           25/30/20
Major-severe storm    60/20/10