:Product: 0721RSGA.txt
:Issued: 2009 Jul 21 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 202 Issued at 2200Z on 21 Jul 2009
IA.  Analysis of Solar Active Regions and Activity from  20/2100Z
to 21/2100Z:  Solar activity was very low. No flares occurred during
the past 24 hours. The solar disk continues to be void of sunspots.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low for the next three days (22-24 July).
IIA.  Geophysical Activity Summary 20/2100Z to 21/2100Z:
The geomagnetic field was quiet during the past 24 hours. A solar
sector boundary crossing from negative to positive was observed at
the ACE spacecraft around 0145Z; yesterdays anticipated high speed
stream did not materialize as solar wind speeds held steady in the
range between 300-340 km/s. There was a possible second solar sector
boundary crossing back to negative polarity at about 1800Z.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be quiet for the next three days (22-24 July).
III.  Event Probabilities 22 Jul-24 Jul
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           21 Jul 068
Predicted   22 Jul-24 Jul  068/068/068
90 Day Mean        21 Jul 069
V.  Geomagnetic A Indices
Observed Afr/Ap 20 Jul  003/006
Estimated Afr/Ap 21 Jul  005/005
Predicted Afr/Ap 22 Jul-24 Jul  005/005-005/005-005/005
VI.  Geomagnetic Activity Probabilities 22 Jul-24 Jul
A.  Middle Latitudes
Active                05/05/05
Minor storm           01/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                10/10/10
Minor storm           01/01/01
Major-severe storm    01/01/01