Substorm Onsets and Phases (SOPHIE) 2010-2020, EPT 75

Outputs from the SOPHIE (Forsyth et al., 2015, 10.1002/2015JA021343) substorm onset and phase detection technique for SuperMAG data between 2010 and 2020 (inclusive).

This version has been updated in to include the MLT and MLAT of the SuperMAG station providing the SML data

This file provides the start times of growth/energy input, expansion and recovery phases determined by SOPHIE for an EPT of 75.

Data generated for "Extreme Birkeland currents are more likely during geomagnetic storms on the dayside of the Earth" by Coxon et al., submitted to J. Geophys. Res.

The data is presented in 5 columns: -

The date and time of the first data point in the given phase (YYYY/MM/DD-HH:MM:SS)

The phase number (1 for growth/energy input, 2 for expansion, 3 for recovery)

A flag indicating that the rate of change of SMU is similar to that of SML in the expansion phase (0 for no flag, 1 for flag)

MLT of the active SML station at the shown time

MLAT of the active SML station at the shown time

The original SuperMAG indices can be downloaded from https://supermag.jhuapl.edu/