:Product: 20040529RSGA.txt :Issued: 2004 May 29 2200 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Environment Center and the U.S. Air Force. # Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 150 Issued at 2200Z on 29 May 2004 IA. Analysis of Solar Active Regions and Activity from 28/2100Z to 29/2100Z: Solar activity has been low. Region 618 (S10W60) produced one C-class flare, a C2.1/Sf at 28/2045 UTC. This region has grown in size and is now in a gamma magnetic configuration. New Region 621 (S14E62) was numbered today. IB. Solar Activity Forecast: Solar activity is expected to be low. Regions 618 and 621 may produce C- class and isolated M- class flares. IIA. Geophysical Activity Summary 28/2100Z to 29/2100Z: The geomagnetic field has been quiet to active. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled. Active and isolated minor storm conditions are possible on days two and three (31 May and 1 June) as a coronal hole high speed solar wind stream begins to move into geoeffective position. III. Event Probabilities 30 May-01 Jun Class M 40/40/25 Class X 05/05/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 29 May 101 Predicted 30 May-01 Jun 105/105/100 90 Day Mean 29 May 103 V. Geomagnetic A Indices Observed Afr/Ap 28 May 006/009 Estimated Afr/Ap 29 May 015/015 Predicted Afr/Ap 30 May-01 Jun 012/012-015/015-015/015 VI. Geomagnetic Activity Probabilities 30 May-01 Jun A. Middle Latitudes Active 15/25/25 Minor storm 05/15/15 Major-severe storm 01/05/05 B. High Latitudes Active 30/30/30 Minor storm 20/25/25 Major-severe storm 05/10/15