:Product: 0423RSGA.txt
:Issued: 2010 Apr 23 2201 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 113 Issued at 2200Z on 23 Apr 2010
IA.  Analysis of Solar Active Regions and Activity from  22/2100Z
to 23/2100Z:  Solar activity was very low. No flares were observed
and the visible disk remained spotless. A CME was visible in both
Stereo A and B coronagraphs leaving the sun around 22/00Z with
trajectories suggesting a potentially geoeffective event.  SOHO
LASCO data gaps in C2 and C3 imagery prohibit confirmation of a halo at this time.
IB.  Solar Activity Forecast:  Solar activity is expected to remain
very low for the next 3 days (24-26 April).
IIA.  Geophysical Activity Summary 22/2100Z to 23/2100Z:
The geomagnetic field was mostly quiet to unsettled, with the
exception of a brief period of minor storming and active conditions
between 00-06Z. This activity was due to elevated solar wind speeds
from a coronal hole and a brief switch to negative polarity.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be quiet for the next 3 days (24-26 April).
III.  Event Probabilities 24 Apr-26 Apr
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           23 Apr 075
Predicted   24 Apr-26 Apr  075/075/080
90 Day Mean        23 Apr 081
V.  Geomagnetic A Indices
Observed Afr/Ap 22 Apr  004/006
Estimated Afr/Ap 23 Apr  012/014
Predicted Afr/Ap 24 Apr-26 Apr  005/008-005/005-005/005
VI.  Geomagnetic Activity Probabilities 24 Apr-26 Apr
A.  Middle Latitudes
Active                10/10/10
Minor storm           05/05/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor storm           10/10/10
Major-severe storm    01/01/01