:Product: 0623RSGA.txt :Issued: 2010 Jun 23 2200 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 174 Issued at 2200Z on 23 Jun 2010 IA. Analysis of Solar Active Regions and Activity from 22/2100Z to 23/2100Z: Solar activity was very low. Region 1082 (N26W52) produced isolated low-level B-class activity. At 23/1712Z, SOHO EIT-195 EUVI imagery observed a possible eruption along a filament channel centered near N40E50. IB. Solar Activity Forecast: Solar activity is expected to remain at very low levels with a slight chance for an isolated C-class event. IIA. Geophysical Activity Summary 22/2100Z to 23/2100Z: The geomagnetic field was quiet. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet on day one (24 June). Field activity is expected to increase to mostly unsettled levels, with isolated active periods, late on day two (25 June) and a slight chance of an isolated minor storm on day three (26 June). This increase in activity is due to a recurrent coronal hole high speed stream that is forecasted to become geoeffective. III. Event Probabilities 24 Jun-26 Jun Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 23 Jun 074 Predicted 24 Jun-26 Jun 074/075/076 90 Day Mean 23 Jun 075 V. Geomagnetic A Indices Observed Afr/Ap 22 Jun 005/006 Estimated Afr/Ap 23 Jun 003/005 Predicted Afr/Ap 24 Jun-26 Jun 005/005-008/008-015/015 VI. Geomagnetic Activity Probabilities 24 Jun-26 Jun A. Middle Latitudes Active 05/10/25 Minor storm 01/01/15 Major-severe storm 01/01/05 B. High Latitudes Active 05/10/30 Minor storm 01/01/20 Major-severe storm 01/01/05