:Product: Report of Solar-Geophysical Activity :Issued: 2010 Jun 17 2201 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 168 Issued at 2200Z on 17 Jun 2010 IA. Analysis of Solar Active Regions and Activity from 16/2100Z to 17/2100Z: Solar activity was very low. New Region 1082 (N28E33) produced a B5/Sf x-ray event at 17/1023Z. IB. Solar Activity Forecast: Solar activity is expected to be very low for the next 3 days (18-20 June). IIA. Geophysical Activity Summary 16/2100Z to 17/2100Z: The geomagnetic field was quiet to unsettled with a few isolated periods of active conditions at mid latitudes. Solar wind speeds remain near 520 km/s. The greater than 2 MeV electron flux at geosynchronous orbit was at high levels during the past 24 hours. IIB. Geophysical Activity Forecast: The geomagnetic field is forecast to be quiet to unsettled with the chance for an isolated period of active conditions on day 1 (18 June). Conditions are forecast to be mostly quiet on days 2 and 3 (19-20 June). 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 070 Predicted 18 Jun-20 Jun 070/070/070 90 Day Mean 17 Jun 076 V. Geomagnetic A Indices Observed Afr/Ap 16 Jun 013/019 Estimated Afr/Ap 17 Jun 010/012 Predicted Afr/Ap 18 Jun-20 Jun 008/010-005/005-005/005 VI. Geomagnetic Activity Probabilities 18 Jun-20 Jun A. Middle Latitudes Active 40/30/30 Minor storm 20/05/05 Major-severe storm 05/01/01 B. High Latitudes Active 50/30/30 Minor storm 30/05/05 Major-severe storm 05/01/01