:Product: 0513RSGA.txt :Issued: 2006 May 13 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 133 Issued at 2200Z on 13 May 2006 IA. Analysis of Solar Active Regions and Activity from 12/2100Z to 13/2100Z: Solar activity was very low. Regions 880 (S08W57) and 883 (S02W27) both decayed slightly. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 12/2100Z to 13/2100Z: The geomagnetic field was quiet to unsettled. Solar wind speed is still slightly elevated at approximately 600 km/s. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled for the next three days (14 - 16 May). III. Event Probabilities 14 May-16 May Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 13 May 074 Predicted 14 May-16 May 075/075/075 90 Day Mean 13 May 082 V. Geomagnetic A Indices Observed Afr/Ap 12 May 010/016 Estimated Afr/Ap 13 May 008/012 Predicted Afr/Ap 14 May-16 May 005/008-005/008-005/005 VI. Geomagnetic Activity Probabilities 14 May-16 May A. Middle Latitudes Active 15/15/15 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 25/25/25 Minor storm 05/05/05 Major-severe storm 01/01/01