:Product: Report of Solar-Geophysical Activity
:Issued: 2012 Aug 28 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 Report of Solar and Geophysical Activity
SDF Number 241 Issued at 2200Z on 28 Aug 2012
IA. Analysis of Solar Active Regions and Activity from 27/2100Z
to 28/2100Z: Solar activity was very low. Region 1558 (N13E65)
produced the largest flare of the period, a B6/Sf at 28/0307Z.
Region 1559 (N18E63) an Axx-alpha type group was numbered today. No
Earth-directed CMEs were observed.
IB. Solar Activity Forecast: Solar activity is expected to be very
low to low with a slight chance for moderate activity for the next
three days (29-31 August).
IIA. Geophysical Activity Summary 27/2100Z to 28/2100Z:
The geomagnetic field was quiet. The greater than 2 MeV electron flux
at geosynchronous orbit reached high levels during the period.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be predominately quiet for days 1-3 (29-31 August).
III. Event Probabilities 29 Aug-31 Aug
Class M 10/10/10
Class X 01/01/01
IV. Penticton 10.7 cm Flux
Observed 28 Aug 111
Predicted 29 Aug-31 Aug 110/115/115
90 Day Mean 28 Aug 124
V. Geomagnetic A Indices
Observed Afr/Ap 27 Aug 007/007
Estimated Afr/Ap 28 Aug 003/004
Predicted Afr/Ap 29 Aug-31 Aug 006/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 29 Aug-31 Aug
A. Middle Latitudes
Minor storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Minor storm 15/15/15
Major-severe storm 05/05/05