:Product: 1003RSGA.txt :Issued: 2010 Oct 03 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 276 Issued at 2200Z on 03 Oct 2010 IA. Analysis of Solar Active Regions and Activity from 02/2100Z to 03/2100Z: Solar activity was very low. Todays activity consisted of three low-level B-class x-ray events: a B1 at 02/2337Z from Region 1109 (N20W80), a B2 at 03/0438Z from Region 1110 (now behind the west limb at N21), and a B1 at 03/1923Z from Region 1111 (N24E06). The disk was otherwise stable and quiet. IB. Solar Activity Forecast: Solar activity is expected to be generally very low, with a chance for an isolated C-class flare from either of Region 1109 or 1111. IIA. Geophysical Activity Summary 02/2100Z to 03/2100Z: The geomagnetic field was quiet. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet for the first day (04 October). For the second and third days (05-06 October), mostly quiet conditions with some unsettled periods are expected with a slight chance for isolated active periods. The increase is forecast because of possible effects from a weak high speed solar wind stream from a favorably positioned coronal hole. III. Event Probabilities 04 Oct-06 Oct Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 03 Oct 080 Predicted 04 Oct-06 Oct 080/080/080 90 Day Mean 03 Oct 081 V. Geomagnetic A Indices Observed Afr/Ap 02 Oct 000/002 Estimated Afr/Ap 03 Oct 001/005 Predicted Afr/Ap 04 Oct-06 Oct 005/005-007/007-007/007 VI. Geomagnetic Activity Probabilities 04 Oct-06 Oct A. Middle Latitudes Active 10/20/20 Minor storm 01/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 10/20/20 Minor storm 01/10/10 Major-severe storm 01/05/05