:Product: 0713RSGA.txt :Issued: 2008 Jul 13 2203 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 195 Issued at 2200Z on 13 Jul 2008 IA. Analysis of Solar Active Regions and Activity from 12/2100Z to 13/2100Z: Solar activity was very low. The visible disk remains spotless. 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 at quiet to active levels. Solar wind velocities measured at the ACE Spacecraft ranged from approximately 650 - 700 km/s. This increase is in response to a favorably positioned coronal hole. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be mostly unsettled with isolated active periods on days one and two (14-15 July). The activity is in response to a recurrent coronal hole high speed stream. Quiet to unsettled conditions are expected on day three (16 July) as the effects of the coronal hole decrease. III. Event Probabilities 14 Jul-16 Jul Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 13 Jul 065 Predicted 14 Jul-16 Jul 066/066/066 90 Day Mean 13 Jul 067 V. Geomagnetic A Indices Observed Afr/Ap 12 Jul 016/021 Estimated Afr/Ap 13 Jul 012/012 Predicted Afr/Ap 14 Jul-16 Jul 010/010-008/010-005/005 VI. Geomagnetic Activity Probabilities 14 Jul-16 Jul A. Middle Latitudes Active 20/15/05 Minor storm 05/05/01 Major-severe storm 01/01/01 B. High Latitudes Active 25/20/10 Minor storm 10/05/01 Major-severe storm 01/01/01