:Product: 0416RSGA.txt :Issued: 2007 Apr 16 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 106 Issued at 2200Z on 16 Apr 2007 IA. Analysis of Solar Active Regions and Activity from 15/2100Z to 16/2100Z: Solar activity was very low. No new regions were numbered today. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 15/2100Z to 16/2100Z: The geomagnetic field was quiet. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be predominately quiet. Quiet to unsettled conditions are expected on 19 April in response to a favorably positioned coronal hole. III. Event Probabilities 17 Apr-19 Apr Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 16 Apr 069 Predicted 17 Apr-19 Apr 070/070/070 90 Day Mean 16 Apr 075 V. Geomagnetic A Indices Observed Afr/Ap 15 Apr 002/004 Estimated Afr/Ap 16 Apr 005/005 Predicted Afr/Ap 17 Apr-19 Apr 005/005-005/005-008/010 VI. Geomagnetic Activity Probabilities 17 Apr-19 Apr A. Middle Latitudes Active 10/10/15 Minor storm 05/05/10 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/20 Minor storm 05/05/15 Major-severe storm 01/01/05