:Product: 0526RSGA.txt
:Issued: 2010 May 26 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 146 Issued at 2200Z on 26 May 2010
IA.  Analysis of Solar Active Regions and Activity from  25/2100Z
to 26/2100Z:  Solar activity has been very low.  Region 1072 (S15
W52) has decayed to a unipolar H type group.  No flares were
observed during the period.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low.
IIA.  Geophysical Activity Summary 25/2100Z to 26/2100Z:
The geomagnetic field has been quiet.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be initially quiet. An increase to unsettled to active
levels with a slight chance for minor storm periods is expected
around mid-day on day one (May 27), due to the arrival of the CME
observed on 23 May. Continued active levels with a slight chance for
minor storm periods are expected on day two (May 28) and continuing
through day three (May 29), with the arrival of the CME observed on
24 May.
III.  Event Probabilities 27 May-29 May
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           26 May 072
Predicted   27 May-29 May  075/076/078
90 Day Mean        26 May 078
V.  Geomagnetic A Indices
Observed Afr/Ap 25 May  004/005
Estimated Afr/Ap 26 May  005/005
Predicted Afr/Ap 27 May-29 May  015/015-020/022-018/020
VI.  Geomagnetic Activity Probabilities 27 May-29 May
A.  Middle Latitudes
Active                50/50/40
Minor storm           15/15/10
Major-severe storm    05/05/05
B.  High Latitudes
Active                50/50/45
Minor storm           25/25/20
Major-severe storm    15/15/10