:Product: 0423RSGA.txt
:Issued: 2007 Apr 23 2203 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
# Space Environment Center and the U.S. Air Force.
#
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 113 Issued at 2200Z on 23 Apr 2007
IA.  Analysis of Solar Active Regions and Activity from  22/2100Z
to 23/2100Z:  Solar activity was very low.  The visible solar disk
remains spotless.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low.
IIA.  Geophysical Activity Summary 22/2100Z to 23/2100Z:
The geomagnetic field ranged from quiet to active with a single minor
storm period at all latitudes from 23/0300 - 0600Z.  The solar wind
speed reached approximately 550 km/s today due to a recurrent
coronal hole high speed stream, but dropped below 450 km/s by the
end of the reporting period.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be quiet to unsettled for the next three days (24 - 26
April).
III.  Event Probabilities 24 Apr-26 Apr
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           23 Apr 069
Predicted   24 Apr-26 Apr  070/070/070
90 Day Mean        23 Apr 074
V.  Geomagnetic A Indices
Observed Afr/Ap 22 Apr  008/010
Estimated Afr/Ap 23 Apr  012/018
Predicted Afr/Ap 24 Apr-26 Apr  005/008-005/005-005/005
VI.  Geomagnetic Activity Probabilities 24 Apr-26 Apr
A.  Middle Latitudes
Active                15/10/10
Minor storm           05/05/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                20/15/15
Minor storm           05/05/05
Major-severe storm    01/01/01