:Product: 1118RSGA.txt :Issued: 2013 Nov 18 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 322 Issued at 2200Z on 18 Nov 2013 IA. Analysis of Solar Active Regions and Activity from 17/2100Z to 18/2100Z: 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 18/0415Z from Region 1897 (S18W30). There are currently 8 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be low with a chance for M-class flares on days one, two, and three (19 Nov, 20 Nov, 21 Nov). IIA. Geophysical Activity Summary 17/2100Z to 18/2100Z: 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 475 km/s at 18/0514Z. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (19 Nov, 20 Nov, 21 Nov). III. Event probabilities 19 Nov-21 Nov Class M 40/40/30 Class X 05/05/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 18 Nov 163 Predicted 19 Nov-21 Nov 160/155/150 90 Day Mean 18 Nov 126 V. Geomagnetic A Indices Observed Afr/Ap 17 Nov 005/006 Estimated Afr/Ap 18 Nov 003/004 Predicted Afr/Ap 19 Nov-21 Nov 006/005-006/005-006/005 VI. Geomagnetic Activity Probabilities 19 Nov-21 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