:Product: 0423RSGA.txt
:Issued: 2006 Apr 23 2204 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 2006
IA.  Analysis of Solar Active Regions and Activity from  22/2100Z
to 23/2100Z:  Solar activity was very low. New Region 875 (S11E71)
was numbered today. This region was responsible for numerous B-class
flares.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low to low.
IIA.  Geophysical Activity Summary 22/2100Z to 23/2100Z:
The geomagnetic field was mostly quiet to unsettled. An isolated
active period was observed at mid-latitudes between 23/0600 UTC and
0900 UTC. Solar wind speed at ACE has decreased from approximately
600 km/s to 500 km/s.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be quiet to unsettled.
III.  Event Probabilities 24 Apr-26 Apr
Class M    05/05/05
Class X    01/01/01
Proton     01/01/01
PCAF       green
IV.  Penticton 10.7 cm Flux
Observed           23 Apr 087
Predicted   24 Apr-26 Apr  085/085/090
90 Day Mean        23 Apr 078
V.  Geomagnetic A Indices
Observed Afr/Ap 22 Apr  010/018
Estimated Afr/Ap 23 Apr  008/008
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                15/15/15
Minor storm           05/05/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                20/15/15
Minor storm           10/05/05
Major-severe storm    01/01/01