:Product: 0330RSGA.txt
:Issued: 2025 Mar 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 89 Issued at 2200Z on 30 Mar 2025

IA.  Analysis of Solar Active Regions and Activity from 29/2100Z to
30/2100Z: Solar activity has been at high levels for the past 24 hours.
There are currently 6 numbered sunspot regions on the disk.
IB.  Solar Activity Forecast: Solar activity is likely to be moderate
with a slight chance for an X-class flare on day one (31 Mar) and
expected to be low with a chance for M-class flares and a slight chance
for an X-class flare on days two and three (01 Apr, 02 Apr).

IIA.  Geophysical Activity Summary 29/2100Z to 30/2100Z: The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 505 km/s at 29/2230Z. Total IMF reached 21
nT at 30/2055Z. The maximum southward component of Bz reached -5 nT at
30/0658Z.  Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 2772 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to unsettled levels on days one, two, and three (31 Mar,
01 Apr, 02 Apr).

III.  Event probabilities 31 Mar-02 Apr
Class M    55/50/50
Class X    10/10/10
Proton     05/05/05
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           30 Mar 171
Predicted   31 Mar-02 Apr 170/175/175
90 Day Mean        30 Mar 180

V.  Geomagnetic A Indices
Observed Afr/Ap 29 Mar  010/012
Estimated Afr/Ap 30 Mar  010/012
Predicted Afr/Ap 31 Mar-02 Apr  007/008-009/010-008/008

VI.  Geomagnetic Activity Probabilities 31 Mar-02 Apr
A.  Middle Latitudes
Active                15/20/15
Minor Storm           05/05/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor Storm           25/30/25
Major-severe storm    25/25/25
