:Product: Report of Solar-Geophysical Activity
:Issued: 2008 Sep 18 2201 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 262 Issued at 2200Z on 18 Sep 2008
IA.  Analysis of Solar Active Regions and Activity from  17/2100Z
to 18/2100Z:  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 17/2100Z to 18/2100Z:
The geomagnetic field was predominately quiet to unsettled. An
isolated active period was observed at Boulder between
18/0900-1200Z. Solar wind speed measured at the ACE spacecraft
showed a gradual decrease from approximately 410 km/s to 370 km/s
during the forecast period. The greater than 2 MeV electron flux at
geosynchronous orbit was at high levels today.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be predominately quiet with isolated unsettled
conditions for the next three days (19-21 September).
III.  Event Probabilities 19 Sep-21 Sep
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           18 Sep 067
Predicted   19 Sep-21 Sep  066/066/066
90 Day Mean        18 Sep 066
V.  Geomagnetic A Indices
Observed Afr/Ap 17 Sep  003/003
Estimated Afr/Ap 18 Sep  005/005
Predicted Afr/Ap 19 Sep-21 Sep  005/005-005/005-005/005
VI.  Geomagnetic Activity Probabilities 19 Sep-21 Sep
A.  Middle Latitudes
Active                10/10/10
Minor storm           01/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                10/10/10
Minor storm           01/01/01
Major-severe storm    01/01/01