:Product: 0505RSGA.txt :Issued: 2008 May 05 2211 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 126 Issued at 2200Z on 05 May 2008 IA. Analysis of Solar Active Regions and Activity from 04/2100Z to 05/2100Z: Solar activity was very low. Region 993 (S31E14) remains a simple bipolar sunspot group. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 04/2100Z to 05/2100Z: The geomagnetic field was predominately at quiet to unsettled levels. An isolated active period was observed at middle latitudes between 1500-1800Z. Solar wind velocities, as measured at the ACE satellite, remain elevated at about 625 km/s. 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 at quiet to unsettled levels with a chance for isolated active periods on days 1 and 2 (06 and 07 May) due to the high speed stream. By day 3 (08 May), geomagnetic conditions are expected to be mostly quiet as the high speed stream abates. III. Event Probabilities 06 May-08 May Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 05 May 68 Predicted 06 May-08 May 068/068/068 90 Day Mean 05 May 071 V. Geomagnetic A Indices Observed Afr/Ap 04 May 006/008 Estimated Afr/Ap 05 May 008/010 Predicted Afr/Ap 06 May-08 May 008/010-008/008-005/005 VI. Geomagnetic Activity Probabilities 06 May-08 May A. Middle Latitudes Active 20/20/10 Minor storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 30/30/10 Minor storm 10/10/05 Major-severe storm 05/05/01