:Product: 0527RSGA.txt
:Issued: 2020 May 27 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 148 Issued at 2200Z on 27 May 2020

IA.  Analysis of Solar Active Regions and Activity from 26/2100Z to
27/2100Z: Solar activity has been at very low levels for the past 24
hours. There are currently 0 numbered sunspot regions on the disk.
IB.  Solar Activity Forecast: Solar activity is expected to be very low
on days one, two, and three (28 May, 29 May, 30 May).

IIA.  Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 346 km/s at 27/0635Z.  Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 194 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet levels on day one (28 May) and quiet to unsettled levels
on days two and three (29 May, 30 May).

III.  Event probabilities 28 May-30 May
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           27 May 068
Predicted   28 May-30 May 070/070/070
90 Day Mean        27 May 070

V.  Geomagnetic A Indices
Observed Afr/Ap 26 May  003/004
Estimated Afr/Ap 27 May  004/005
Predicted Afr/Ap 28 May-30 May  005/005-008/008-008/008

VI.  Geomagnetic Activity Probabilities 28 May-30 May
A.  Middle Latitudes
Active                05/10/10
Minor Storm           01/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor Storm           15/25/25
Major-severe storm    05/20/20