From: Space Weather Prediction Center (NOAA)
Posted: Friday, October 18, 2019
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 291 Issued at 2200Z on 18 Oct 2019 IA. Analysis of Solar Active Regions and Activity from 17/2100Z to 18/2100Z: 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 (19 Oct, 20 Oct, 21 Oct). IIA. Geophysical Activity Summary 17/2100Z to 18/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 478 km/s at 18/1528Z. Total IMF reached 5 nT at 18/1637Z. The maximum southward component of Bz reached -4 nT at 18/0303Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 158 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one and two (19 Oct, 20 Oct) and quiet to active levels on day three (21 Oct).
III. Event probabilities 19 Oct-21 Oct
Class M 01/01/01
Class X 01/01/01
IV. Penticton 10.7 cm Flux
Observed 18 Oct 066
Predicted 19 Oct-21 Oct 066/066/066
90 Day Mean 18 Oct 068
V. Geomagnetic A Indices
Observed Afr/Ap 17 Oct 004/004
Estimated Afr/Ap 18 Oct 005/005
Predicted Afr/Ap 19 Oct-21 Oct 006/005-006/005-009/012
VI. Geomagnetic Activity Probabilities 19 Oct-21 Oct
A. Middle Latitudes
Minor Storm 01/01/10
Major-severe storm 01/01/01
B. High Latitudes
Minor Storm 15/15/30
Major-severe storm 05/05/40
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