:Product: 0331RSGA.txt :Issued: 2007 Mar 31 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 090 Issued at 2200Z on 31 Mar 2007 IA. Analysis of Solar Active Regions and Activity from 30/2100Z to 31/2100Z: Solar activity was very low. Region 949 (N06E21) produced today's only flare event, a B2/Sf at 0143Z. The region is a small, C-type group. The remainder of the disk is spotless. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 30/2100Z to 31/2100Z: The geomagnetic field was quiet during the past 24 hours. IIB. Geophysical Activity Forecast: The geomagnetic field should be initially quiet tomorrow (1 April). However, late in the day an increase to unsettled to active is expected to begin and to continue through 2-3 April in response to a favorably positioned coronal hole. III. Event Probabilities 01 Apr-03 Apr Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 31 Mar 073 Predicted 01 Apr-03 Apr 073/073/073 90 Day Mean 31 Mar 078 V. Geomagnetic A Indices Observed Afr/Ap 30 Mar 003/004 Estimated Afr/Ap 31 Mar 005/005 Predicted Afr/Ap 01 Apr-03 Apr 007/010-015/025-012/015 VI. Geomagnetic Activity Probabilities 01 Apr-03 Apr A. Middle Latitudes Active 20/30/30 Minor storm 10/20/20 Major-severe storm 01/05/05 B. High Latitudes Active 25/35/35 Minor storm 15/25/25 Major-severe storm 05/10/10