:Product: Report of Solar-Geophysical Activity :Issued: 2010 Jun 22 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 173 Issued at 2200Z on 22 Jun 2010 IA. Analysis of Solar Active Regions and Activity from 21/2100Z to 22/2100Z: Solar activity was very low. Region 1082 (N26W37) produced isolated low-level B-class activity. 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 21/2100Z to 22/2100Z: The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit briefly reached high levels during the period. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet for days one and two (23 - 24 June). Field activity is expected to increase to quiet to unsettled levels, with isolated active periods, late on day three (25 June) due to a recurrent coronal hole high speed stream forecasted to become geoeffective. III. Event Probabilities 23 Jun-25 Jun Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 22 Jun 073 Predicted 23 Jun-25 Jun 073/073/074 90 Day Mean 22 Jun 075 V. Geomagnetic A Indices Observed Afr/Ap 21 Jun 006/005 Estimated Afr/Ap 22 Jun 005/005 Predicted Afr/Ap 23 Jun-25 Jun 005/005-005/005-008/008 VI. Geomagnetic Activity Probabilities 23 Jun-25 Jun A. Middle Latitudes Active 05/05/10 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 05/05/10 Minor storm 01/01/01 Major-severe storm 01/01/01