:Product: 1223RSGA.txt
:Issued: 2006 Dec 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 357 Issued at 2200Z on 23 Dec 2006
IA.  Analysis of Solar Active Regions and Activity from  22/2100Z
to 23/2100Z:  Solar activity was very low.
IB.  Solar Activity Forecast:  Solar activity is expected to continue
at very low levels.
IIA.  Geophysical Activity Summary 22/2100Z to 23/2100Z:
The geomagnetic field was quiet to active. Solar wind speed at ACE
has decreased from approximately 670 km/s to 570 km/s. The greater
than 2 MeV electron flux at geosynchronous orbit reached high levels
today.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be quiet to unsettled. Isolated active periods are
possible on 24 December.
III.  Event Probabilities 24 Dec-26 Dec
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green
IV.  Penticton 10.7 cm Flux
Observed           23 Dec 073
Predicted   24 Dec-26 Dec  075/075/075
90 Day Mean        23 Dec 082
V.  Geomagnetic A Indices
Observed Afr/Ap 22 Dec  010/014
Estimated Afr/Ap 23 Dec  010/015
Predicted Afr/Ap 24 Dec-26 Dec  008/008-005/005-005/005
VI.  Geomagnetic Activity Probabilities 24 Dec-26 Dec
A.  Middle Latitudes
Active                20/15/15
Minor storm           05/05/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                25/20/15
Minor storm           15/05/05
Major-severe storm    05/01/01