:Product: 1218RSGA.txt
:Issued: 2011 Dec 18 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 352 Issued at 2200Z on 18 Dec 2011
IA.  Analysis of Solar Active Regions and Activity from  17/2100Z
to 18/2100Z:  Solar activity was low.  The largest flare in the past
24 hours was a C3 at 17/2255Z from Region 1376 (N20W18).  New Region
1381 (S18E19) was also responsible for low level activity.  New
Region 1382 (S18E25) was also assigned.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low to low during the period.
IIA.  Geophysical Activity Summary 17/2100Z to 18/2100Z:
The geomagnetic field was quiet.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be mostly quiet for the next three days (19-21
December).
III.  Event Probabilities 19 Dec-21 Dec
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green
IV.  Penticton 10.7 cm Flux
Observed           18 Dec 128
Predicted   19 Dec-21 Dec  128/128/128
90 Day Mean        18 Dec 145
V.  Geomagnetic A Indices
Observed Afr/Ap 17 Dec  002/000
Estimated Afr/Ap 18 Dec  002/001
Predicted Afr/Ap 19 Dec-21 Dec  006/005-005/005-004/005
VI.  Geomagnetic Activity Probabilities 19 Dec-21 Dec
A.  Middle Latitudes
Active                05/05/01
Minor storm           01/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor storm           20/20/05
Major-severe storm    10/10/01