:Product: 1224RSGA.txt
:Issued: 2010 Dec 24 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 24 Dec 2010
IA.  Analysis of Solar Active Regions and Activity from  23/2100Z
to 24/2100Z:  Solar activity was very low.  No significant events
were observed during the last 24 hours.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low.
IIA.  Geophysical Activity Summary 23/2100Z to 24/2100Z:
The geomagnetic field was quiet.  Observations from the ACE
spacecraft indicate a solar sector boundary crossing occurred around
23/2230Z.  Density has shown a steady increase through the period
accompanied by increasing solar wind speeds from 240 to 340 km/s.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be quiet for day one (25 December).  Quiet to unsettled
conditions with isolated active levels are expected for days two and
three (26-27 December).  Increased activity is due to a recurrent
coronal hole high speed stream and possible effects from the CME
observed 23 December.
III.  Event Probabilities 25 Dec-27 Dec
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           24 Dec 079
Predicted   25 Dec-27 Dec  078/080/080
90 Day Mean        24 Dec 083
V.  Geomagnetic A Indices
Observed Afr/Ap 23 Dec  001/000
Estimated Afr/Ap 24 Dec  003/005
Predicted Afr/Ap 25 Dec-27 Dec  005/005-008/008-007/008
VI.  Geomagnetic Activity Probabilities 25 Dec-27 Dec
A.  Middle Latitudes
Active                05/10/10
Minor storm           01/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                05/20/20
Minor storm           01/05/05
Major-severe storm    01/01/01