:Product: 0525RSGA.txt :Issued: 2007 May 25 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 145 Issued at 2200Z on 25 May 2007 IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: Solar activity was very low. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z: The geomagnetic field ranged from quiet to active. Activity is due to a recurrent coronal hole high speed stream. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels again today. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be unsettled to active on 26 May and quiet to unsettled 27 - 28 May. III. Event Probabilities 26 May-28 May Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 25 May 068 Predicted 26 May-28 May 070/070/070 90 Day Mean 25 May 073 V. Geomagnetic A Indices Observed Afr/Ap 24 May 021/028 Estimated Afr/Ap 25 May 014/025 Predicted Afr/Ap 26 May-28 May 016/025-012/020-006/010 VI. Geomagnetic Activity Probabilities 26 May-28 May A. Middle Latitudes Active 40/30/20 Minor storm 25/15/10 Major-severe storm 10/10/05 B. High Latitudes Active 40/30/25 Minor storm 30/20/15 Major-severe storm 15/15/10