:Product: 0518RSGA.txt
:Issued: 2008 May 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 139 Issued at 2200Z on 18 May 2008
IA.  Analysis of Solar Active Regions and Activity from  17/2100Z
to 18/2100Z:  Solar activity was very low.  Region 994 (S12W22)
increased in complexity briefly becoming a Cso Beta magnetic class.
IB.  Solar Activity Forecast:  Solar activity is expected to remain
very low.  There is a slight chance of a C-class flare, particularly
from Region 994.
IIA.  Geophysical Activity Summary 17/2100Z to 18/2100Z:
The geomagnetic field was quiet.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to range from unsettled to active levels over the next
three days, with a chance for minor storm levels at high latitudes
as a recurrent coronal hole high speed stream becomes geoeffective.
III.  Event Probabilities 19 May-21 May
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           18 May 072
Predicted   19 May-21 May  072/072/072
90 Day Mean        18 May 071
V.  Geomagnetic A Indices
Observed Afr/Ap 17 May  001/002
Estimated Afr/Ap 18 May  005/005
Predicted Afr/Ap 19 May-21 May  010/012-015/030-010/015
VI.  Geomagnetic Activity Probabilities 19 May-21 May
A.  Middle Latitudes
Active                20/25/20
Minor storm           10/15/10
Major-severe storm    01/09/01
B.  High Latitudes
Active                25/45/30
Minor storm           15/25/15
Major-severe storm    01/10/05