:Product: 1217RSGA.txt :Issued: 2019 Dec 17 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 351 Issued at 2200Z on 17 Dec 2019 IA. Analysis of Solar Active Regions and Activity from 16/2100Z to 17/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 0 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be very low on days one, two, and three (18 Dec, 19 Dec, 20 Dec). IIA. Geophysical Activity Summary 16/2100Z to 17/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 395 km/s at 17/0118Z. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on days one and two (18 Dec, 19 Dec) and quiet levels on day three (20 Dec). III. Event probabilities 18 Dec-20 Dec Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 17 Dec 071 Predicted 18 Dec-20 Dec 070/070/070 90 Day Mean 17 Dec 069 V. Geomagnetic A Indices Observed Afr/Ap 16 Dec 001/001 Estimated Afr/Ap 17 Dec 004/005 Predicted Afr/Ap 18 Dec-20 Dec 008/010-011/012-007/008 VI. Geomagnetic Activity Probabilities 18 Dec-20 Dec A. Middle Latitudes Active 30/30/20 Minor Storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 30/30/30 Major-severe storm 35/35/25