:Product: Report of Solar-Geophysical Activity
:Issued: 2008 May 27 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 148 Issued at 2200Z on 27 May 2008
IA.  Analysis of Solar Active Regions and Activity from  26/2100Z
to 27/2100Z:  Solar activity was at very low levels.  The visible
disk was spotless.
IB.  Solar Activity Forecast:  Solar activity is expected to remain
at very low levels.
IIA.  Geophysical Activity Summary 26/2100Z to 27/2100Z:
The geomagnetic field was at quiet levels.  The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels again
today.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be at mostly quiet levels for day one (28 May). 
Activity is expected to increase to quiet to unsettled levels with a
slight chance for isolated active periods on days two and three (29
and 30 May).  The increase in activity is forecast due to a
recurrent coronal high speed stream that is expected to rotate into
a geoeffective position.
III.  Event Probabilities 28 May-30 May
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           27 May 068
Predicted   28 May-30 May  068/068/068
90 Day Mean        27 May 071
V.  Geomagnetic A Indices
Observed Afr/Ap 26 May  003/004
Estimated Afr/Ap 27 May  005/005
Predicted Afr/Ap 28 May-30 May  005/005-008/010-008/010
VI.  Geomagnetic Activity Probabilities 28 May-30 May
A.  Middle Latitudes
Active                10/15/15
Minor storm           05/05/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                10/30/30
Minor storm           05/10/10
Major-severe storm    01/05/05