:Product: 1223RSGA.txt
:Issued: 2008 Dec 23 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 358 Issued at 2200Z on 23 Dec 2008
IA.  Analysis of Solar Active Regions and Activity from  22/2100Z
to 23/2100Z:  Solar activity was very low. No flares were observed.
The visible disk was spotless.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low.
IIA.  Geophysical Activity Summary 22/2100Z to 23/2100Z:
Geomagnetic field activity was at quiet to unsettled levels. ACE
solar wind measurements indicated a recurrent coronal hole
high-speed stream began early in the summary period. Solar wind
velocities increased to a high of 579 km/sec at 23/1419Z and
remained elevated during the rest of the period. IMF Bz was variable
in the +07 to -07 nT range with a sustained southward period during
approximately 22/2300Z to 23/0400Z.
IIB.  Geophysical Activity Forecast:  Geomagnetic field activity is
expected to be at mostly quiet levels throughout the forecast period
(24 - 26 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 069
Predicted   24 Dec-26 Dec  069/069/069
90 Day Mean        23 Dec 069
V.  Geomagnetic A Indices
Observed Afr/Ap 22 Dec  003/004
Estimated Afr/Ap 23 Dec  007/010
Predicted Afr/Ap 24 Dec-26 Dec  005/005-005/005-005/005
VI.  Geomagnetic Activity Probabilities 24 Dec-26 Dec
A.  Middle Latitudes
Active                10/10/05
Minor storm           01/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/10
Minor storm           01/01/01
Major-severe storm    01/01/01