:Product: 0427RSGA.txt
:Issued: 2006 Apr 27 2203 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
# Space Environment Center and the U.S. Air Force.
#
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 117 Issued at 2200Z on 27 Apr 2006
IA.  Analysis of Solar Active Regions and Activity from  26/2100Z
to 27/2100Z:  Solar activity was high.  Region 875 (S11E20) produced
an M7/1N flare at 27/1552 UTC.  The flare was highly impulsive; no
associated radio sweeps were observed and no proton events are
expected.
IB.  Solar Activity Forecast:  Solar activity is expected to be low
to moderate.  Further M-class flares are possible from Region 875.
IIA.  Geophysical Activity Summary 26/2100Z to 27/2100Z:
The geomagnetic field has been quiet to unsettled.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be quiet to unsettled.
III.  Event Probabilities 28 Apr-30 Apr
Class M    30/30/30
Class X    05/05/05
Proton     01/01/01
PCAF       green
IV.  Penticton 10.7 cm Flux
Observed           27 Apr 101
Predicted   28 Apr-30 Apr  100/100/100
90 Day Mean        27 Apr 080
V.  Geomagnetic A Indices
Observed Afr/Ap 26 Apr  002/005
Estimated Afr/Ap 27 Apr  004/005
Predicted Afr/Ap 28 Apr-30 Apr  003/005-003/005-003/005
VI.  Geomagnetic Activity Probabilities 28 Apr-30 Apr
A.  Middle Latitudes
Active                10/10/10
Minor storm           01/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor storm           05/05/05
Major-severe storm    01/01/01