:Product: 1231RSGA.txt :Issued: 2019 Dec 30 2235 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 364 Issued at 2200Z on 31 Dec 2019 IA. Analysis of Solar Active Regions and Activity from 29/2100Z to 30/2100Z: 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 (31 Dec, 01 Jan, 02 Jan). IIA. Geophysical Activity Summary 29/2100Z to 30/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 334 km/s at 30/0346Z. Total IMF reached 7 nT at 30/2008Z. The maximum southward component of Bz reached -4 nT at 30/1412Z. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on days one and two (31 Dec, 01 Jan) and quiet levels on day three (02 Jan). III. Event probabilities 31 Dec-02 Jan Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 30 Dec 071 Predicted 31 Dec-02 Jan 070/070/070 90 Day Mean 30 Dec 070 V. Geomagnetic A Indices Observed Afr/Ap 29 Dec 000/001 Estimated Afr/Ap 30 Dec 003/004 Predicted Afr/Ap 31 Dec-02 Jan 007/008-008/008-006/005 VI. Geomagnetic Activity Probabilities 31 Dec-02 Jan A. Middle Latitudes Active 15/15/05 Minor Storm 05/05/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 25/25/20 Major-severe storm 20/20/10