:Product: 0419RSGA.txt
:Issued: 2008 Apr 19 2203 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 19 Apr 2008
IA.  Analysis of Solar Active Regions and Activity from  18/2100Z
to 19/2100Z:  Solar activity was very low.  New Region 991 (S09E29)
was numbered today and has a Bxo-beta configuration spot group.
IB.  Solar Activity Forecast:  Solar activity is expected to remain
very low.  There is a slight chance of an isolated C-class event
from Region 991.
IIA.  Geophysical Activity Summary 18/2100Z to 19/2100Z:
The geomagnetic field was quiet.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be mostly quiet on day one (20 April).  A recurrent
coronal hole high speed stream begins to become geoeffective on day
two (21 April) with unsettled conditions expected.  Unsettled to
active levels, with a chance for minor to major storms at high
latitudes, are anticipated by day three (22 April).
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 071
Predicted   20 Apr-22 Apr  075/075/080
90 Day Mean        19 Apr 072
V.  Geomagnetic A Indices
Observed Afr/Ap 18 Apr  005/006
Estimated Afr/Ap 19 Apr  005/005
Predicted Afr/Ap 20 Apr-22 Apr  005/005-008/012-015/025
VI.  Geomagnetic Activity Probabilities 20 Apr-22 Apr
A.  Middle Latitudes
Active                10/20/25
Minor storm           05/05/10
Major-severe storm    01/01/05
B.  High Latitudes
Active                10/10/40
Minor storm           05/10/10
Major-severe storm    01/05/10