Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 6 February 2020

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 37 Issued at 2200Z on 06 Feb 2020

IA. Analysis of Solar Active Regions and Activity from 05/2100Z to 06/2100Z: 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 (07 Feb, 08 Feb, 09 Feb).

IIA. Geophysical Activity Summary 05/2100Z to 06/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 592 km/s at 06/2051Z. Total IMF reached 11 nT at 06/0512Z. The maximum southward component of Bz reached -10 nT at 06/0516Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 248 pfu.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on day one (07 Feb), quiet to unsettled levels on day two (08 Feb) and quiet levels on day three (09 Feb).

III. Event probabilities 07 Feb-09 Feb
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green

IV. Penticton 10.7 cm Flux
Observed 06 Feb 071
Predicted 07 Feb-09 Feb 071/071/071
90 Day Mean 06 Feb 071

V. Geomagnetic A Indices
Observed Afr/Ap 05 Feb 004/004
Estimated Afr/Ap 06 Feb 014/018
Predicted Afr/Ap 07 Feb-09 Feb 012/012-008/008-005/005

VI. Geomagnetic Activity Probabilities 07 Feb-09 Feb
A. Middle Latitudes
Active 25/15/10
Minor Storm 10/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 15/15/15
Minor Storm 30/25/20
Major-severe storm 40/20/10