:Product: 1113RSGA.txt :Issued: 2013 Nov 13 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 317 Issued at 2200Z on 13 Nov 2013 IA. Analysis of Solar Active Regions and Activity from 12/2100Z to 13/2100Z: Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C9 event observed at 12/2308Z from Region 1897 (S20E51). There are currently 7 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be low with a chance for M-class flares and a slight chance for an X-class flare on days one and two (14 Nov, 15 Nov) and expected to be low with a chance for M-class flares on day three (16 Nov). IIA. Geophysical Activity Summary 12/2100Z to 13/2100Z: 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 439 km/s at 12/2122Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 325 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (14 Nov, 15 Nov, 16 Nov). Protons greater than 10 Mev have a slight chance of crossing threshold on days one and two (14 Nov, 15 Nov). III. Event probabilities 14 Nov-16 Nov Class M 50/50/50 Class X 15/15/05 Proton 20/20/05 PCAF green IV. Penticton 10.7 cm Flux Observed 13 Nov 171 Predicted 14 Nov-16 Nov 170/165/160 90 Day Mean 13 Nov 123 V. Geomagnetic A Indices Observed Afr/Ap 12 Nov 002/002 Estimated Afr/Ap 13 Nov 004/005 Predicted Afr/Ap 14 Nov-16 Nov 006/005-006/005-006/005 VI. Geomagnetic Activity Probabilities 14 Nov-16 Nov 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 20/20/20 Major-severe storm 10/10/10