:Product: Report of Solar-Geophysical Activity
:Issued: 2026 Mar 25 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 84 Issued at 2200Z on 25 Mar 2026

IA.  Analysis of Solar Active Regions and Activity from 24/2100Z to
25/2100Z: Solar activity has been at low levels for the past 24 hours.
There are currently 7 numbered sunspot regions on the disk.
IB.  Solar Activity Forecast: Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (26 Mar, 27 Mar,
28 Mar).

IIA.  Geophysical Activity Summary 24/2100Z to 25/2100Z: The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 633 km/s at 25/0858Z. Total IMF
reached 10 nT at 25/0843Z. The maximum southward component of Bz reached
-8 nT at 25/0714Z.  Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 8451 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to minor storm levels on day one (26 Mar), quiet to
unsettled levels on day two (27 Mar) and quiet levels on day three (28
Mar).

III.  Event probabilities 26 Mar-28 Mar
Class M    30/30/30
Class X    05/05/05
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           25 Mar 140
Predicted   26 Mar-28 Mar 145/142/140
90 Day Mean        25 Mar 141

V.  Geomagnetic A Indices
Observed Afr/Ap 24 Mar  012/016
Estimated Afr/Ap 25 Mar  015/017
Predicted Afr/Ap 26 Mar-28 Mar  016/020-008/008-006/005

VI.  Geomagnetic Activity Probabilities 26 Mar-28 Mar
A.  Middle Latitudes
Active                45/20/10
Minor Storm           25/05/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                10/15/15
Minor Storm           25/25/20
Major-severe storm    60/25/20