:Product: 0412RSGA.txt
:Issued: 2009 Apr 12 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 102 Issued at 2200Z on 12 Apr 2009
IA.  Analysis of Solar Active Regions and Activity from  11/2100Z
to 12/2100Z:  Solar activity was very low. No flares were observed
during the past 24 hours. The visible disk remained spotless.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low.
IIA.  Geophysical Activity Summary 11/2100Z to 12/2100Z:
The geomagnetic field was predominantly quiet. A single period of
unsettled conditions was observed at mid-latitudes between
12/0600-0900Z. Solar wind velocities measured at ACE gradually
declined from 563 to 458 km/s as effects from the coronal hole
high-speed stream wane. The greater than 2 MeV electron flux at
geosynchronous orbit reached high levels today.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be quiet for the next three days (13-15 April).
III.  Event Probabilities 13 Apr-15 Apr
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           12 Apr 069
Predicted   13 Apr-15 Apr  070/070/070
90 Day Mean        12 Apr 070
V.  Geomagnetic A Indices
Observed Afr/Ap 11 Apr  007/009
Estimated Afr/Ap 12 Apr  005/007
Predicted Afr/Ap 13 Apr-15 Apr  005/005-005/005-005/005
VI.  Geomagnetic Activity Probabilities 13 Apr-15 Apr
A.  Middle Latitudes
Active                05/05/05
Minor storm           01/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                05/05/05
Minor storm           01/01/01
Major-severe storm    01/01/01