- Press Release
- Sep 26, 2022
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 17 October 2019
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 290 Issued at 2200Z on 17 Oct 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 Oct, 19 Oct, 20 Oct).
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 490 km/s at 16/2217Z. Total IMF reached 5 nT at 17/0757Z. The maximum southward component of Bz reached -3 nT at 17/0345Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 126 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (18 Oct, 19 Oct, 20 Oct).
III. Event probabilities 18 Oct-20 Oct
Class M 01/01/01
Class X 01/01/01
IV. Penticton 10.7 cm Flux
Observed 17 Oct 066
Predicted 18 Oct-20 Oct 066/066/066
90 Day Mean 17 Oct 068
V. Geomagnetic A Indices
Observed Afr/Ap 16 Oct 005/004
Estimated Afr/Ap 17 Oct 006/006
Predicted Afr/Ap 18 Oct-20 Oct 005/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 18 Oct-20 Oct
A. Middle Latitudes
Minor Storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Minor Storm 20/20/20
Major-severe storm 10/10/10