:Product: 0731RSGA.txt
:Issued: 2009 Jul 31 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 212 Issued at 2200Z on 31 Jul 2009
IA.  Analysis of Solar Active Regions and Activity from  30/2100Z
to 31/2100Z:  Solar activity was very low.  No flares were observed
during the past 24 hours.  The solar disk remains spotless.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low.
IIA.  Geophysical Activity Summary 30/2100Z to 31/2100Z:
The geomagnetic field was at quiet to unsettled levels.  Solar wind
observations from the ACE spacecraft indicted the presence of a
coronal hole high speed stream.  Velocities increased from around
340 km/s to 420 km/s, with +/- 5nT fluctuations in the IMF Bz.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be at quiet to unsettled levels with a chance for
isolated active conditions for day one (01 August).  Predominantly
quiet conditions are expected for days two and three (02-03 August).
III.  Event Probabilities 01 Aug-03 Aug
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           31 Jul 069
Predicted   01 Aug-03 Aug  068/068/068
90 Day Mean        31 Jul 069
V.  Geomagnetic A Indices
Observed Afr/Ap 30 Jul  002/003
Estimated Afr/Ap 31 Jul  005/007
Predicted Afr/Ap 01 Aug-03 Aug  007/007-005/005-005/005
VI.  Geomagnetic Activity Probabilities 01 Aug-03 Aug
A.  Middle Latitudes
Active                20/05/05
Minor storm           05/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                20/05/05
Minor storm           10/01/01
Major-severe storm    05/01/01