:Product: 20040829RSGA.txt :Issued: 2004 Aug 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 242 Issued at 2200Z on 29 Aug 2004 IA. Analysis of Solar Active Regions and Activity from 28/2100Z to 29/2100Z: Solar activity remains at very low levels. Region 663 (N07W59) has undergone little change, and remains a magnetically simple Beta-class region. Region 666 (N16E38) was numbered today. IB. Solar Activity Forecast: Solar activity is expected to remain at very low levels through 01 Sep. Chances for some C-class and greater activity will increase on 01 Sep with the return of Region 656. IIA. Geophysical Activity Summary 28/2100Z to 29/2100Z: The geomagnetic field has been at quiet to unsettled levels. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to remain at quiet to unsettled levels through 01 Sep. III. Event Probabilities 30 Aug-01 Sep Class M 05/05/10 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 29 Aug 086 Predicted 30 Aug-01 Sep 085/090/110 90 Day Mean 29 Aug 109 V. Geomagnetic A Indices Observed Afr/Ap 28 Aug 006/012 Estimated Afr/Ap 29 Aug 004/007 Predicted Afr/Ap 30 Aug-01 Sep 004/005-004/005-005/008 VI. Geomagnetic Activity Probabilities 30 Aug-01 Sep A. Middle Latitudes Active 10/10/10 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor storm 05/05/05 Major-severe storm 01/01/01 VII. COMMENTS The ACE spacecraft orbit will bring ACE to its closest approach with the Sun on August 30, 2004. During that time possible solar radio noise may interfere with spacecraft telemetry resulting in the loss of real time solar wind plasma, magnetic field, and particle data.