:Product: Report of Solar-Geophysical Activity
:Issued: 2026 Oct 30 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 303 Issued at 2200Z on 30 Oct 2026

IA.  Analysis of Solar Active Regions and Activity from 29/2100Z to
30/2100Z: Solar activity has been at very low levels for the past 24
hours. There are currently 3 numbered sunspot regions on the disk.
IB.  Solar Activity Forecast: Solar activity is expected to be very low
with a slight chance for a C-class flare on days one, two, and three (31
Oct, 01 Nov, 02 Nov).

IIA.  Geophysical Activity Summary 29/2100Z to 30/2100Z: The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 347 km/s at 30/2057Z. Total IMF reached 9 nT at
30/2054Z. The maximum southward component of Bz reached -8 nT at
30/2054Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 4488 pfu at 30/1440Z.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (31 Oct), quiet to
minor storm levels on day two (01 Nov) and quiet to unsettled levels on
day three (02 Nov).

III.  Event probabilities 31 Oct-02 Nov
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           30 Oct 090
Predicted   31 Oct-02 Nov 90/90/95
90 Day Mean        30 Oct 110

V.  Geomagnetic A Indices
Observed Afr/Ap 29 Oct  004/004
Estimated Afr/Ap 30 Oct  008/009
Predicted Afr/Ap 31 Oct-02 Nov  021/028-016/020-007/010

VI.  Geomagnetic Activity Probabilities 31 Oct-02 Nov
A.  Middle Latitudes
Active                40/40/20
Minor Storm           35/25/05
Major-severe storm    10/05/01
B.  High Latitudes
Active                05/10/20
Minor Storm           25/30/30
Major-severe storm    70/55/20