:Product: Report of Solar-Geophysical Activity :Issued: 2010 Mar 31 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 090 Issued at 2200Z on 31 Mar 2010 IA. Analysis of Solar Active Regions and Activity from 30/2100Z to 31/2100Z: Solar activity has been very low. Region 1057 (N16W35) continues to decay, both in spot number and total area. No flares were observed during the past 24 hours. IB. Solar Activity Forecast: Solar activity is expected to be very low with a slight chance of an isolated C-class event. IIA. Geophysical Activity Summary 30/2100Z to 31/2100Z: The geomagnetic field has been quiet. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to remain quiet for the next three days (01-03 April). 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 081 Predicted 01 Apr-03 Apr 080/080/075 90 Day Mean 31 Mar 083 V. Geomagnetic A Indices Observed Afr/Ap 30 Mar 004/005 Estimated Afr/Ap 31 Mar 003/005 Predicted Afr/Ap 01 Apr-03 Apr 005/005-005/005-005/005 VI. Geomagnetic Activity Probabilities 01 Apr-03 Apr A. Middle Latitudes Active 01/01/01 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 01/01/01 Minor storm 01/01/01 Major-severe storm 01/01/01