Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 15 February 2020

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 46 Issued at 2200Z on 15 Feb 2020

IA. Analysis of Solar Active Regions and Activity from 14/2100Z to 15/2100Z: 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 (16 Feb, 17 Feb, 18 Feb).

IIA. Geophysical Activity Summary 14/2100Z to 15/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 366 km/s at 15/0942Z. Total IMF reached 6 nT at 15/1706Z. The maximum southward component of Bz reached -4 nT at 15/0952Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 799 pfu.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on day one (16 Feb) and quiet to unsettled levels on days two and three (17 Feb, 18 Feb).

III. Event probabilities 16 Feb-18 Feb
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green

IV. Penticton 10.7 cm Flux
Observed 15 Feb 071
Predicted 16 Feb-18 Feb 071/071/071
90 Day Mean 15 Feb 071

V. Geomagnetic A Indices
Observed Afr/Ap 14 Feb 003/002
Estimated Afr/Ap 15 Feb 004/005
Predicted Afr/Ap 16 Feb-18 Feb 006/005-008/010-007/008

VI. Geomagnetic Activity Probabilities 16 Feb-18 Feb
A. Middle Latitudes
Active 10/20/15
Minor Storm 01/05/05
Major-severe storm 01/01/01
B. High Latitudes
Active 15/15/15
Minor Storm 20/25/25
Major-severe storm 10/30/25