:Product: 0516RSGA.txt :Issued: 2010 May 16 2200 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 136 Issued at 2200Z on 16 May 2010 IA. Analysis of Solar Active Regions and Activity from 15/2100Z to 16/2100Z: Solar activity was very low. No flares were detected. The visible disk was spotless. IB. Solar Activity Forecast: Solar activity is expected to be very low through the period (17 - 19 May). IIA. Geophysical Activity Summary 15/2100Z to 16/2100Z: The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit was high during the period. IIB. Geophysical Activity Forecast: Geomagnetic field activity is expected to be at quiet levels through the period (17 - 19 May). III. Event Probabilities 17 May-19 May Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 16 May 069 Predicted 17 May-19 May 070/072/072 90 Day Mean 16 May 080 V. Geomagnetic A Indices Observed Afr/Ap 15 May 002/004 Estimated Afr/Ap 16 May 002/004 Predicted Afr/Ap 17 May-19 May 005/005-005/006-005/006 VI. Geomagnetic Activity Probabilities 17 May-19 May A. Middle Latitudes Active 05/05/05 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 10/05/05 Minor storm 01/01/01 Major-severe storm 01/01/01