:Product: 0811RSGA.txt
:Issued: 2013 Aug 11 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 223 Issued at 2200Z on 11 Aug 2013

IA.  Analysis of Solar Active Regions and Activity from 10/2100Z to
11/2100Z: Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C2 event observed at
11/1932Z from Region 1817 (S22E22). There are currently 6 numbered
sunspot regions on the disk.
IB.  Solar Activity Forecast: Solar activity is likely to be low with a
slight chance for an M-class flare on days one, two, and three (12 Aug,
13 Aug, 14 Aug).

IIA.  Geophysical Activity Summary 10/2100Z to 11/2100Z: The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed,
as measured by the ACE spacecraft, reached a peak speed of 464 km/s at
10/2254Z. Total IMF reached 7 nT at 10/2129Z. The maximum southward
component of Bz reached -2 nT at 11/1013Z. Electrons greater than 2 MeV
at geosynchronous orbit reached a peak level of 646 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to unsettled levels on day one (12 Aug) and quiet levels
on days two and three (13 Aug, 14 Aug).

III.  Event probabilities 12 Aug-14 Aug
Class M    10/10/10
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           11 Aug 110
Predicted   12 Aug-14 Aug 115/120/120
90 Day Mean        11 Aug 115

V.  Geomagnetic A Indices
Observed Afr/Ap 10 Aug  007/006
Estimated Afr/Ap 11 Aug  006/006
Predicted Afr/Ap 12 Aug-14 Aug  007/008-006/005-006/005

VI.  Geomagnetic Activity Probabilities 12 Aug-14 Aug
A.  Middle Latitudes
Active                10/05/05
Minor Storm           05/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor Storm           20/15/15
Major-severe storm    20/10/05