:Product: 1203RSGA.txt :Issued: 2013 Dec 03 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 337 Issued at 2200Z on 03 Dec 2013 IA. Analysis of Solar Active Regions and Activity from 02/2100Z to 03/2100Z: Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C1 event observed at 03/1455Z. There are currently 5 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 (04 Dec, 05 Dec, 06 Dec). IIA. Geophysical Activity Summary 02/2100Z to 03/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed, as measured by the ACE spacecraft, reached a peak speed of 444 km/s at 03/0839Z. Total IMF reached 8 nT at 03/0326Z. The maximum southward component of Bz reached -6 nT at 03/1328Z. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one and two (04 Dec, 05 Dec) and quiet to unsettled levels on day three (06 Dec). III. Event probabilities 04 Dec-06 Dec Class M 25/25/25 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 03 Dec 136 Predicted 04 Dec-06 Dec 135/140/145 90 Day Mean 03 Dec 129 V. Geomagnetic A Indices Observed Afr/Ap 02 Dec 001/001 Estimated Afr/Ap 03 Dec 007/008 Predicted Afr/Ap 04 Dec-06 Dec 006/005-006/005-007/008 VI. Geomagnetic Activity Probabilities 04 Dec-06 Dec A. Middle Latitudes Active 05/05/15 Minor Storm 01/01/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 15/15/20 Major-severe storm 05/05/20