:Product: 0617RSGA.txt :Issued: 2007 Jun 17 2202 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 168 Issued at 2200Z on 17 Jun 2007 IA. Analysis of Solar Active Regions and Activity from 16/2100Z to 17/2100Z: Solar activity was very low. The visible disk remains spotless. IB. Solar Activity Forecast: Solar activity is expected to remain very low. IIA. Geophysical Activity Summary 16/2100Z to 17/2100Z: The geomagnetic field was quiet to unsettled. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled on 18 June. Conditions will range from unsettled to minor storm levels on 19-20 June as a recurrent coronal hole becomes geoeffective. There is a chance for isolated major storm periods at high latitudes on 20 June due to the coronal hole high speed stream. III. Event Probabilities 18 Jun-20 Jun Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 17 Jun 067 Predicted 18 Jun-20 Jun 068/068/068 90 Day Mean 17 Jun 074 V. Geomagnetic A Indices Observed Afr/Ap 16 Jun 004/007 Estimated Afr/Ap 17 Jun 004/006 Predicted Afr/Ap 18 Jun-20 Jun 005/005-010/015-015/020 VI. Geomagnetic Activity Probabilities 18 Jun-20 Jun A. Middle Latitudes Active 15/25/30 Minor storm 10/15/20 Major-severe storm 01/05/10 B. High Latitudes Active 20/30/35 Minor storm 15/20/25 Major-severe storm 05/10/15