:Product: 0619RSGA.txt :Issued: 2008 Jun 19 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 171 Issued at 2200Z on 19 Jun 2008 IA. Analysis of Solar Active Regions and Activity from 18/2100Z to 19/2100Z: Solar activity was very low. No flares occurred during the past 24 hours. Region 999 (S03E20) was quiet and stable. IB. Solar Activity Forecast: Solar activity is expected to remain very low. IIA. Geophysical Activity Summary 18/2100Z to 19/2100Z: The geomagnetic field was mostly quiet. Solar wind velocity observed at ACE showed a steady decline during the past 24 hours, with day end speeds around 450 km/s. The greater than 2 MeV electron flux at geosynchronous orbit was at high levels. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled on the first day (20 June), and is expected to be predominantly quiet for second and third days (20-21 June). III. Event Probabilities 20 Jun-22 Jun Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 19 Jun 065 Predicted 20 Jun-22 Jun 065/065/065 90 Day Mean 19 Jun 070 V. Geomagnetic A Indices Observed Afr/Ap 18 Jun 008/009 Estimated Afr/Ap 19 Jun 005/005 Predicted Afr/Ap 20 Jun-22 Jun 008/008-005/005-005/005 VI. Geomagnetic Activity Probabilities 20 Jun-22 Jun A. Middle Latitudes Active 25/10/10 Minor storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 25/10/10 Minor storm 10/05/05 Major-severe storm 05/01/01