| Report of Solar-Geophysical Activity Issued: 2007 Aug 20 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 232 Issued at 2200Z on 20 Aug 2007 IA. Analysis of Solar Active Regions and Activity from 19/2100Z to 20/2100Z: Solar activity has been very low. IB. Solar Activity Forecast: Solar activity is expected to be very low to low. IIA. Geophysical Activity Summary 19/2100Z to 20/2100Z: The geomagnetic field has been quiet. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet 21 August and quiet to unsettled 22 - 23 August. III. Event Probabilities 21 Aug-23 Aug Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 20 Aug 069 Predicted 21 Aug-23 Aug 070/070/070 90 Day Mean 20 Aug 071 V. Geomagnetic A Indices Observed Afr/Ap 19 Aug 002/003 Estimated Afr/Ap 20 Aug 002/003 Predicted Afr/Ap 21 Aug-23 Aug 002/005-006/008-004/005 VI. Geomagnetic Activity Probabilities 21 Aug-23 Aug A. Middle Latitudes Active 15/20/15 Minor storm 01/05/01 Major-severe storm 01/01/01 B. High Latitudes Active 20/25/20 Minor storm 05/10/05 Major-severe storm 01/01/01
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NOAA Space Weather Scale descriptions can be found at www.sec.noaa.gov/NOAAscales |