:Product: 0505RSGA.txt :Issued: 2011 May 05 2220 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 125 Issued at 2200Z on 05 May 2011 :::::::::: CORRECTED COPY :::::::::: IA. Analysis of Solar Active Regions and Activity from 04/2100Z to 05/2100Z: Solar activity was very low during the past 24 hours. Region 1204 (N17W00) produced a B8 x-ray event at 05/1756Z. New Region 1207 (N24E40) was numbered today as a simple bi-polar group. The remaining active regions were quiet and stable. IB. Solar Activity Forecast: Solar activity is expected to be very low to low during days one through three (06-08 May). IIA. Geophysical Activity Summary 04/2100Z to 05/2100Z: The geomagnetic field was quiet to unsettled during the past 24 hours. Observations from the ACE spacecraft indicated the solar wind speed remained steady at about 400 km/s during the period. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during the period. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled on days one through three (06-08 May). III. Event Probabilities 06 May-08 May Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 05 May 105 Predicted 06 May-08 May 105/105/105 90 Day Mean 05 May 109 V. Geomagnetic A Indices Observed Afr/Ap 04 May 003/006 Estimated Afr/Ap 05 May 006/007 Predicted Afr/Ap 06 May-08 May 005/007-007/007-007/007 VI. Geomagnetic Activity Probabilities 06 May-08 May A. Middle Latitudes Active 05/10/10 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 10/15/15 Minor storm 01/10/10 Major-severe storm 01/01/01