:Product: 0615RSGA.txt :Issued: 2008 Jun 15 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 167 Issued at 2200Z on 15 Jun 2008 IA. Analysis of Solar Active Regions and Activity from 14/2100Z to 15/2100Z: Solar activity was at very low levels. IB. Solar Activity Forecast: Solar activity is expected to remain at very low levels. IIA. Geophysical Activity Summary 14/2100Z to 15/2100Z: The geomagnetic field was at mostly unsettled to minor storm levels. Solar wind signatures indicating a co-rotating interaction region followed by the onset of a coronal hole high speed stream were observed by the ACE spacecraft. Wind speed reached a maximum of about 700 km/s at 15/1610Z. The interplanetary magnetic field Bz component ranged between +/- 13 nT during the early part of the summary period; for the remainder of the period Bz ranged between +/-6 nT. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at unsettled to active levels on day one (16 June), with a chance for minor storm conditions possible due to the coronal hole high speed stream. On days two and three (17 and 18 June) expect activity levels to decrease to mostly unsettled levels with a chance for active periods as the high speed stream continues to be geoeffective. III. Event Probabilities 16 Jun-18 Jun Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 15 Jun 067 Predicted 16 Jun-18 Jun 067/067/067 90 Day Mean 15 Jun 070 V. Geomagnetic A Indices Observed Afr/Ap 14 Jun 016/016 Estimated Afr/Ap 15 Jun 018/018 Predicted Afr/Ap 16 Jun-18 Jun 015/015-012/012-012/012 VI. Geomagnetic Activity Probabilities 16 Jun-18 Jun A. Middle Latitudes Active 35/25/25 Minor storm 20/15/15 Major-severe storm 10/05/05 B. High Latitudes Active 35/25/25 Minor storm 20/15/15 Major-severe storm 10/05/05