Report of Solar-Geophysical Activity
Issued: 2005 Sep 25 2200 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 268 Issued at 2200Z on 25 Sep 2005 IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: Solar activity has been very low. Regions 810 (N08W35) and 812 (S02E45) produced no flares, and exhibited no significant development. No new regions were numbered today.
IB. Solar Activity Forecast: Solar activity is expected to be very low. Slight chance of C-class flares possible from Region 810.
IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z:
The geomagnetic field was quiet. 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 all three days, with a moderate chance of unsettled to active conditions on 27-28 September.
III. Event Probabilities 26 Sep-28 Sep
Class M 10/10/10
Class X 01/01/01
Proton 01/01/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 25 Sep 081
Predicted 26 Sep-28 Sep 080/080/080
90 Day Mean 25 Sep 094
V. Geomagnetic A Indices
Observed Afr/Ap 24 Sep 002/004
Estimated Afr/Ap 25 Sep 003/005
Predicted Afr/Ap 26 Sep-28 Sep 005/008-010/015-012/020 VI. Geomagnetic Activity Probabilities 26 Sep-28 Sep A. Middle Latitudes
Active 15/20/20
Minor storm 05/10/10
Major-severe storm 01/01/01
B. High Latitudes
Active 20/25/25
Minor storm 10/15/15
Major-severe storm 01/01/01