:Product: 0414RSGA.txt
:Issued: 2021 Apr 14 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 104 Issued at 2200Z on 14 Apr 2021

IA.  Analysis of Solar Active Regions and Activity from 13/2100Z to
14/2100Z: 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 slight chance for a C-class flare on days one, two, and three (15
Apr, 16 Apr, 17 Apr).

IIA.  Geophysical Activity Summary 13/2100Z to 14/2100Z: The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 461 km/s at 14/1505Z. Total IMF reached 6 nT at
13/2138Z. The maximum southward component of Bz reached -3 nT at
14/1031Z.  Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 178 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to unsettled levels on day one (15 Apr), quiet to active
levels on day two (16 Apr) and quiet to minor storm levels on day three
(17 Apr).

III.  Event probabilities 15 Apr-17 Apr
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           14 Apr 074
Predicted   15 Apr-17 Apr 074/074/074
90 Day Mean        14 Apr 076

V.  Geomagnetic A Indices
Observed Afr/Ap 13 Apr  005/006
Estimated Afr/Ap 14 Apr  005/005
Predicted Afr/Ap 15 Apr-17 Apr  007/008-014/018-015/020

VI.  Geomagnetic Activity Probabilities 15 Apr-17 Apr
A.  Middle Latitudes
Active                20/40/40
Minor Storm           05/15/25
Major-severe storm    01/01/05
B.  High Latitudes
Active                15/10/10
Minor Storm           25/25/25
Major-severe storm    25/50/65