:Product: 0514RSGA.txt :Issued: 2011 May 14 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 134 Issued at 2200Z on 14 May 2011 IA. Analysis of Solar Active Regions and Activity from 13/2100Z to 14/2100Z: Solar activity was very low. Three new regions emerged in the last 24 hours, Region 1213 (S21W80), Region 1214 (S20E17), and Region 1215 (S23W30). All are small and magnetically simple. IB. Solar Activity Forecast: Solar activity is expected to remain very low. A slight chance for a C-class flare exists for the next three days (15-17 May). IIA. Geophysical Activity Summary 13/2100Z to 14/2100Z: The geomagnetic field was quiet. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled, with a chance for an active period, and a slight chance for a minor storm period late on day 1 (15 May). The increase in activity is forecast due to a coronal hole high speed stream becoming geoeffective. Unsettled conditions are expected to persist for days 2 and 3 (16-17 May) with a slight chance for isolated active periods. III. Event Probabilities 15 May-17 May Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 14 May 091 Predicted 15 May-17 May 092/092/090 90 Day Mean 14 May 110 V. Geomagnetic A Indices Observed Afr/Ap 13 May 003/004 Estimated Afr/Ap 14 May 004/005 Predicted Afr/Ap 15 May-17 May 012/012-008/008-008/008 VI. Geomagnetic Activity Probabilities 15 May-17 May A. Middle Latitudes Active 20/15/15 Minor storm 10/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 30/20/20 Minor storm 15/10/10 Major-severe storm 05/01/01