:Product: 0418RSGA.txt
:Issued: 2008 Apr 18 2203 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 109 Issued at 2200Z on 18 Apr 2008
IA.  Analysis of Solar Active Regions and Activity from  17/2100Z
to 18/2100Z:  Solar activity was very low.
IB.  Solar Activity Forecast:  Solar activity is expected to remain
very low.
IIA.  Geophysical Activity Summary 17/2100Z to 18/2100Z:
The geomagnetic field was quiet to unsettled.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to remain mostly quiet for days 1 and 2 (19-20 April)
becming mostly unsettled by day 3 (21 April) as a recurrent coronal
hole begins to rotate into a geoeffective position.
III.  Event Probabilities 19 Apr-21 Apr
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           18 Apr 070
Predicted   19 Apr-21 Apr  070/075/075
90 Day Mean        18 Apr 071
V.  Geomagnetic A Indices
Observed Afr/Ap 17 Apr  007/008
Estimated Afr/Ap 18 Apr  007/007
Predicted Afr/Ap 19 Apr-21 Apr  005/005-005/005-008/015
VI.  Geomagnetic Activity Probabilities 19 Apr-21 Apr
A.  Middle Latitudes
Active                10/10/20
Minor storm           05/05/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                10/10/40
Minor storm           05/05/10
Major-severe storm    01/01/05