:Product: 0312RSGA.txt :Issued: 2008 Mar 12 2203 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 072 Issued at 2200Z on 12 Mar 2008 IA. Analysis of Solar Active Regions and Activity from 11/2100Z to 12/2100Z: Solar activity was very low. The visible solar disk was spotless. IB. Solar Activity Forecast: Solar activity is expected to remain very low. IIA. Geophysical Activity Summary 11/2100Z to 12/2100Z: The geomagnetic field was quiet to active under the continued influence of a recurrent coronal hole high speed stream. Solar wind speed at ACE occasionally reached 700 km/s during the 24 hour period. The greater than 2 MeV electrons at geosynchronous orbit remained at high levels. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to remain at unsettled to occasionally active levels, with a chance for minor storms at high latitudes, during days 1 and 2 (13-14 March), Day 3 (15 Mar) is expected to be mostly quiet as the high speed stream wanes. III. Event Probabilities 13 Mar-15 Mar Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 12 Mar 069 Predicted 13 Mar-15 Mar 070/070/070 90 Day Mean 12 Mar 073 V. Geomagnetic A Indices Observed Afr/Ap 11 Mar 007/012 Estimated Afr/Ap 12 Mar 010/012 Predicted Afr/Ap 13 Mar-15 Mar 008/010-008/008-005/005 VI. Geomagnetic Activity Probabilities 13 Mar-15 Mar A. Middle Latitudes Active 25/25/10 Minor storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 40/30/10 Minor storm 10/10/05 Major-severe storm 04/04/01