:Product: 1220RSGA.txt :Issued: 2019 Dec 20 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 354 Issued at 2200Z on 20 Dec 2019 IA. Analysis of Solar Active Regions and Activity from 19/2100Z to 20/2100Z: 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 (21 Dec, 22 Dec, 23 Dec). IIA. Geophysical Activity Summary 19/2100Z to 20/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 535 km/s at 19/2211Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 615 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (21 Dec, 22 Dec, 23 Dec). III. Event probabilities 21 Dec-23 Dec Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 20 Dec 070 Predicted 21 Dec-23 Dec 070/070/070 90 Day Mean 20 Dec 069 V. Geomagnetic A Indices Observed Afr/Ap 19 Dec 012/012 Estimated Afr/Ap 20 Dec 005/006 Predicted Afr/Ap 21 Dec-23 Dec 006/005-006/005-006/005 VI. Geomagnetic Activity Probabilities 21 Dec-23 Dec A. Middle Latitudes Active 10/10/10 Minor Storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 20/15/15 Minor Storm 20/20/20 Major-severe storm 10/10/10