:Product: 0419RSGA.txt
:Issued: 2009 Apr 19 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 109 Issued at 2200Z on 19 Apr 2009
IA.  Analysis of Solar Active Regions and Activity from  18/2100Z
to 19/2100Z:  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 18/2100Z to 19/2100Z:
The geomagnetic field was quiet.  Observations from the ACE
spacecraft show solar wind speeds gradually decayed through the
period from about 540 km/s to near 450 km/s as the coronal hole high
speed stream waned.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be mostly quiet for 20 April.  Quiet to unsettled levels
are expected for 21 - 22 April due to a recurrent enhancement in
solar wind velocities.
III.  Event Probabilities 20 Apr-22 Apr
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green
IV.  Penticton 10.7 cm Flux
Observed           19 Apr 070
Predicted   20 Apr-22 Apr  070/070/070
90 Day Mean        19 Apr 070
V.  Geomagnetic A Indices
Observed Afr/Ap 18 Apr  008/008
Estimated Afr/Ap 19 Apr  005/005
Predicted Afr/Ap 20 Apr-22 Apr  005/005-008/008-007/007
VI.  Geomagnetic Activity Probabilities 20 Apr-22 Apr
A.  Middle Latitudes
Active                05/15/10
Minor storm           01/05/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                05/15/10
Minor storm           01/05/05
Major-severe storm    01/01/01