:Product: 0601RSGA.txt :Issued: 2010 Jun 01 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 152 Issued at 2200Z on 01 Jun 2010 IA. Analysis of Solar Active Regions and Activity from 31/2100Z to 01/2100Z: Solar activity was very low. The SOHO C2 imagery observed a slow moving CME at 31/2154Z. The plane of sky speed was estimated around 307 km/s. This event was correlated with a disappearing filament located near N30W30. No flares were observed during the past 24 hours. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 31/2100Z to 01/2100Z: The geomagnetic field was at quiet to active levels. The ACE spacecraft observations show the continued presence of the coronal hole high speed stream. Solar wind speeds are around 525 km/s with IMF Bz at +/- 6 nT. The greater than 2 MeV electron flux at geosynchronous orbit was at high levels today. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled with isolated active conditions for the next two days (02-03 June). Predominantly quiet levels are expected for day three (04 June) as the high speed stream subsides. III. Event Probabilities 02 Jun-04 Jun Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 01 Jun 073 Predicted 02 Jun-04 Jun 072/072/072 90 Day Mean 01 Jun 078 V. Geomagnetic A Indices Observed Afr/Ap 31 May 014/016 Estimated Afr/Ap 01 Jun 010/012 Predicted Afr/Ap 02 Jun-04 Jun 008/010-006/008-005/005 VI. Geomagnetic Activity Probabilities 02 Jun-04 Jun A. Middle Latitudes Active 15/10/05 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 25/15/10 Minor storm 05/01/01 Major-severe storm 01/01/01