:Product: 0424RSGA.txt :Issued: 2007 Apr 24 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 114 Issued at 2200Z on 24 Apr 2007 IA. Analysis of Solar Active Regions and Activity from 23/2100Z to 24/2100Z: Solar activity was very low. The background solar x-ray flux increased from below A-class to approximately A6 during the past 24 hours and a bright emerging flux region has rotated onto the east limb. However, no sunspots are visible in this region yet. IB. Solar Activity Forecast: Solar activity is expected to be very low. There is a slight chance for a C-class flare from the east limb. IIA. Geophysical Activity Summary 23/2100Z to 24/2100Z: The geomagnetic field was quiet. Solar wind speed remains slightly elevated at approximately 440 km/s. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet for the next three days (25 - 27 April). III. Event Probabilities 25 Apr-27 Apr Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 24 Apr 073 Predicted 25 Apr-27 Apr 075/075/075 90 Day Mean 24 Apr 074 V. Geomagnetic A Indices Observed Afr/Ap 23 Apr 010/018 Estimated Afr/Ap 24 Apr 003/005 Predicted Afr/Ap 25 Apr-27 Apr 005/005-005/005-005/005 VI. Geomagnetic Activity Probabilities 25 Apr-27 Apr A. Middle Latitudes Active 05/05/05 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 10/10/10 Minor storm 05/05/05 Major-severe storm 01/01/01