:Product: 0227RSGA.txt :Issued: 2007 Feb 27 2203 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 058 Issued at 2200Z on 27 Feb 2007 IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: Solar activity was very low. No significant activity has been observed during the past 24 hours. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field has ranged from quiet to active. Solar wind speed has been increasing throughout the day up to about 560 km/s, indicating the arrival of a coronal hole high speed stream. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled for the next three days (28 February - 02 March). Isolated active periods are possible on 28 February due to the coronal hole high speed stream. III. Event Probabilities 28 Feb-02 Mar Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 27 Feb 075 Predicted 28 Feb-02 Mar 075/075/075 90 Day Mean 27 Feb 082 V. Geomagnetic A Indices Observed Afr/Ap 26 Feb 004/004 Estimated Afr/Ap 27 Feb 008/015 Predicted Afr/Ap 28 Feb-02 Mar 010/010-008/008-005/005 VI. Geomagnetic Activity Probabilities 28 Feb-02 Mar A. Middle Latitudes Active 15/15/10 Minor storm 10/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 20/20/15 Minor storm 10/05/05 Major-severe storm 01/01/01