:Product: 0420RSGA.txt
:Issued: 2009 Apr 20 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 110 Issued at 2200Z on 20 Apr 2009
IA.  Analysis of Solar Active Regions and Activity from  19/2100Z
to 20/2100Z:  Solar activity was very low.  No flares were observed. 
The visible disk remains spotless.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low.
IIA.  Geophysical Activity Summary 19/2100Z to 20/2100Z:
The geomagnetic field was quiet.  Observations from the ACE
spacecraft indicated steady solar wind speeds throughout the period
averaging about 450 km/s.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be at quiet to unsettled levels for 21 - 22 April due to
a recurrent enhancement in solar wind velocities.  By 23 April,
mostly quiet conditions are expected.
III.  Event Probabilities 21 Apr-23 Apr
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green
IV.  Penticton 10.7 cm Flux
Observed           20 Apr 070
Predicted   21 Apr-23 Apr  070/070/070
90 Day Mean        20 Apr 070
V.  Geomagnetic A Indices
Observed Afr/Ap 19 Apr  004/004
Estimated Afr/Ap 20 Apr  005/005
Predicted Afr/Ap 21 Apr-23 Apr  007/008-007/007-005/005
VI.  Geomagnetic Activity Probabilities 21 Apr-23 Apr
A.  Middle Latitudes
Active                10/10/05
Minor storm           05/05/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/10/05
Minor storm           05/05/01
Major-severe storm    01/01/01