:Product: 0418RSGA.txt
:Issued: 2007 Apr 18 2203 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
# Space Environment Center and the U.S. Air Force.
#
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 108 Issued at 2200Z on 18 Apr 2007
IA.  Analysis of Solar Active Regions and Activity from  17/2100Z
to 18/2100Z:  Solar activity was very low.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low.
IIA.  Geophysical Activity Summary 17/2100Z to 18/2100Z:
The geomagnetic field was predominantly quiet to unsettled with one
active period from 18/0000Z-0300Z.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be predominantly quiet to unsettled with isolated active
periods for the next three days.  Isolated minor storm conditions
are possible at high latitudes on 20 April in response to a
favorably positioned coronal hole.
III.  Event Probabilities 19 Apr-21 Apr
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           18 Apr 069
Predicted   19 Apr-21 Apr  070/070/070
90 Day Mean        18 Apr 075
V.  Geomagnetic A Indices
Observed Afr/Ap 17 Apr  006/008
Estimated Afr/Ap 18 Apr  008/008
Predicted Afr/Ap 19 Apr-21 Apr  008/010-015/015-008/010
VI.  Geomagnetic Activity Probabilities 19 Apr-21 Apr
A.  Middle Latitudes
Active                20/30/25
Minor storm           10/20/10
Major-severe storm    01/05/01
B.  High Latitudes
Active                25/35/30
Minor storm           15/25/15
Major-severe storm    05/10/05