:Product: 0224RSGA.txt :Issued: 2013 Feb 24 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 Solar Geophysical Activity Report and Forecast SDF Number 55 Issued at 2200Z on 24 Feb 2013 IA. Analysis of Solar Active Regions and Activity from 23/2100Z to 24/2100Z: Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C2 event observed at 24/1435Z. There are currently 2 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be very low with a chance for a C-class flares on days one, two, and three (25 Feb, 26 Feb, 27 Feb). IIA. Geophysical Activity Summary 23/2100Z to 24/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed, as measured by the ACE spacecraft, reached a peak speed of 381 km/s at 23/2105Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 133 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (25 Feb, 26 Feb, 27 Feb). III. Event probabilities 25 Feb-27 Feb Class M 05/05/05 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 24 Feb 095 Predicted 25 Feb-27 Feb 095/095/090 90 Day Mean 24 Feb 114 V. Geomagnetic A Indices Observed Afr/Ap 23 Feb 006/006 Estimated Afr/Ap 24 Feb 004/005 Predicted Afr/Ap 25 Feb-27 Feb 005/005-005/005-004/005 VI. Geomagnetic Activity Probabilities 25 Feb-27 Feb 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 15/15/15 Major-severe storm 10/10/10