:Product: 0225RSGA.txt :Issued: 2013 Feb 25 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 56 Issued at 2200Z on 25 Feb 2013 IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 5 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 and a slight chance for an M-class flare on days one, two, and three (26 Feb, 27 Feb, 28 Feb). IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z: 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 369 km/s at 25/1527Z. Total IMF reached 9 nT at 25/1320Z. The maximum southward component of Bz reached -5 nT at 25/1548Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 364 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (26 Feb, 27 Feb, 28 Feb). III. Event probabilities 26 Feb-28 Feb Class M 10/10/10 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 25 Feb 095 Predicted 26 Feb-28 Feb 100/100/100 90 Day Mean 25 Feb 114 V. Geomagnetic A Indices Observed Afr/Ap 24 Feb 002/004 Estimated Afr/Ap 25 Feb 002/002 Predicted Afr/Ap 26 Feb-28 Feb 004/005-004/005-006/005 VI. Geomagnetic Activity Probabilities 26 Feb-28 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