:Product: 0407RSGA.txt :Issued: 2007 Apr 07 2203 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 097 Issued at 2200Z on 07 Apr 2007 IA. Analysis of Solar Active Regions and Activity from 06/2100Z to 07/2100Z: Solar activity was at very low levels. The visible disk remains spotless. No new regions were numbered today. IB. Solar Activity Forecast: Solar activity is expected to be at very low levels. IIA. Geophysical Activity Summary 06/2100Z to 07/2100Z: The geomagnetic field was at quiet to unsettled levels today. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels again today. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on 08 April. Predominantly unsettled to active conditions are expected on 09 April due to a recurrent coronal hole high speed stream. Minor storm to isolated major storm periods are possible with the onset of the coronal hole. Unsettled to isolated active levels are expected on 10 April as the coronal hole begins to wane. III. Event Probabilities 08 Apr-10 Apr Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 07 Apr 071 Predicted 08 Apr-10 Apr 070/070/070 90 Day Mean 07 Apr 077 V. Geomagnetic A Indices Observed Afr/Ap 06 Apr 002/004 Estimated Afr/Ap 07 Apr 002/005 Predicted Afr/Ap 08 Apr-10 Apr 008/010-015/020-010/010 VI. Geomagnetic Activity Probabilities 08 Apr-10 Apr A. Middle Latitudes Active 20/25/20 Minor storm 05/15/10 Major-severe storm 01/10/05 B. High Latitudes Active 20/35/20 Minor storm 10/20/10 Major-severe storm 05/15/05