:Product: Report of Solar-Geophysical Activity
:Issued: 2008 Dec 20 2201 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 355 Issued at 2200Z on 20 Dec 2008
IA.  Analysis of Solar Active Regions and Activity from  19/2100Z
to 20/2100Z:  Solar activity was very low.  The visible disk remained
spotless.
IB.  Solar Activity Forecast:  Solar activity is expected to remain
at very low levels.
IIA.  Geophysical Activity Summary 19/2100Z to 20/2100Z:
The geomagnetic field was at quiet levels.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be at quiet levels on 21 December.  Quiet to unsettled
conditions are expected for 22 - 23 December.  The increase in
activity is forecast due to a recurrent coronal hole high speed
stream.
III.  Event Probabilities 21 Dec-23 Dec
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           20 Dec 069
Predicted   21 Dec-23 Dec  069/069/069
90 Day Mean        20 Dec 069
V.  Geomagnetic A Indices
Observed Afr/Ap 19 Dec  002/003
Estimated Afr/Ap 20 Dec  002/005
Predicted Afr/Ap 21 Dec-23 Dec  005/005-010/010-008/008
VI.  Geomagnetic Activity Probabilities 21 Dec-23 Dec
A.  Middle Latitudes
Active                10/20/15
Minor storm           01/05/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                10/20/15
Minor storm           01/05/01
Major-severe storm    01/01/01