:Product: Report of Solar-Geophysical Activity
:Issued: 2008 May 25 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 146 Issued at 2200Z on 25 May 2008
IA.  Analysis of Solar Active Regions and Activity from  24/2100Z
to 25/2100Z:  Solar activity was at very low levels.
IB.  Solar Activity Forecast:  Solar activity is expected to remain
at very low levels.
IIA.  Geophysical Activity Summary 24/2100Z to 25/2100Z:
The geomagnetic field was at quiet to unsettled levels.  Wind speed
measured by the ACE spacecraft began the period at approximately 500
km/s.  Since the beginning of the period wind speeds have been
declining, and ended the summary period at around 440 km/s.  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 remain at quiet to unsettled levels, with a slight
chance of isolated active conditions at high latitudes for the
forecast period (26 to 28 May).
III.  Event Probabilities 26 May-28 May
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green
IV.  Penticton 10.7 cm Flux
Observed           25 May 068
Predicted   26 May-28 May  068/068/068
90 Day Mean        25 May 071
V.  Geomagnetic A Indices
Observed Afr/Ap 24 May  004/007
Estimated Afr/Ap 25 May  006/010
Predicted Afr/Ap 26 May-28 May  005/008-005/008-005/008
VI.  Geomagnetic Activity Probabilities 26 May-28 May
A.  Middle Latitudes
Active                15/15/15
Minor storm           05/05/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                20/20/20
Minor storm           05/05/05
Major-severe storm    01/01/01