:Product: 0922RSGA.txt :Issued: 2010 Sep 22 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 265 Issued at 2200Z on 22 Sep 2010 IA. Analysis of Solar Active Regions and Activity from 21/2100Z to 22/2100Z: Solar activity was at very low levels. There were numerous B-class events, most of which were produced by Region 1109 (N22E67). Region 1109 is a Dko group with a beta magnetic configuration and has increased in size over the last 24 hours. Region 1108 (S30W09) is now an Hhx alpha group. IB. Solar Activity Forecast: Solar activity is expected to be at very low to low levels with a slight chance for M-class events for the next three days (23-25 September). IIA. Geophysical Activity Summary 21/2100Z to 22/2100Z: The geomagnetic field has been at quiet levels during the past 24 hours. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be unsettled to active on days one and two (23-24 September) due to a recurrent coronal hole high speed stream. Day three (25 September) is expected to be mostly unsettled. III. Event Probabilities 23 Sep-25 Sep Class M 10/10/10 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 22 Sep 085 Predicted 23 Sep-25 Sep 088/088/088 90 Day Mean 22 Sep 079 V. Geomagnetic A Indices Observed Afr/Ap 21 Sep 005/006 Estimated Afr/Ap 22 Sep 002/005 Predicted Afr/Ap 23 Sep-25 Sep 015/018-015/018-012/012 VI. Geomagnetic Activity Probabilities 23 Sep-25 Sep A. Middle Latitudes Active 35/35/25 Minor storm 05/05/01 Major-severe storm 01/01/01 B. High Latitudes Active 40/40/30 Minor storm 10/10/01 Major-severe storm 01/01/01