Report of Solar-Geophysical Activity
Issued: 2008 Sep 11 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 255 Issued at 2200Z on 11 Sep 2008


IA. Analysis of Solar Active Regions and Activity from 10/2100Z
to 11/2100Z: Solar activity was very low. New Region 1001 (N06E14)
was numbered today.
IB. Solar Activity Forecast: Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 10/2100Z to 11/2100Z:
The geomagnetic field was quiet. 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 at quiet levels for 12 September. Quiet to unsettled
conditions are forecast for 13 September, with unsettled to active
conditions expected for 14 September. The increase in activity is
forecast due to a recurrent coronal hole high speed stream.
III. Event Probabilities 12 Sep-14 Sep
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 11 Sep 067
Predicted 12 Sep-14 Sep 066/066/066
90 Day Mean 11 Sep 066
V. Geomagnetic A Indices
Observed Afr/Ap 10 Sep 002/004
Estimated Afr/Ap 11 Sep 002/005
Predicted Afr/Ap 12 Sep-14 Sep 005/005-007/008-015/020
VI. Geomagnetic Activity Probabilities 12 Sep-14 Sep
A. Middle Latitudes
Active 05/20/35
Minor storm 01/01/10
Major-severe storm 01/01/05
B. High Latitudes
Active 10/25/40
Minor storm 01/05/20
Major-severe storm 01/01/10
 

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