From: Space Weather Prediction Center (NOAA)
Posted: Tuesday, April 16, 2019
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 106 Issued at 2200Z on 16 Apr 2019 IA. Analysis of Solar Active Regions and Activity from 15/2100Z to 16/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 1 numbered sunspot regions on the disk.
IB. Solar Activity Forecast: Solar activity is expected to be very low with a slight chance for a C-class flare on days one, two, and three (17 Apr, 18 Apr, 19 Apr). IIA. Geophysical Activity Summary 15/2100Z to 16/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 405 km/s at 16/1026Z. Total IMF reached 6 nT at 16/0233Z. The maximum southward component of Bz reached -4 nT at 16/0144Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 1770 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (17 Apr, 18 Apr, 19 Apr). III. Event probabilities 17 Apr-19 Apr Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 16 Apr 074 Predicted 17 Apr-19 Apr 074/074/072 90 Day Mean 16 Apr 072 V. Geomagnetic A Indices Observed Afr/Ap 15 Apr 008/008 Estimated Afr/Ap 16 Apr 007/006 Predicted Afr/Ap 17 Apr-19 Apr 006/005-006/005-005/005 VI. Geomagnetic Activity Probabilities 17 Apr-19 Apr A. Middle Latitudes Active 10/15/10 Minor Storm 05/01/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 20/20/20 Major-severe storm 20/20/20
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