Statistics of large impulsive magnetic events in the auroral zone

Kyle Reiter; Sébastien Guillon; Martin Connors; Brian Jackel

doi:10.1051/swsc/2021029

Statistics of large impulsive magnetic events in the auroral zone

Kyle Reiter
, Sébastien Guillon
, Martin Connors
, Brian Jackel

Centre for Science

University of Calgary
Hydro-Quebec

Research output: Contribution to journal › Journal Article › peer-review

3 Citations (Scopus)

Abstract

Impulsive geomagnetic variations, latitudinally localized to the auroral zone, have been observed from 2015 to 2020. These impulsive events have been observed mostly in the pre-midnight sector as upward vertical perturbations. Diurnal variations in geomagnetically-triggered harmonic distortion events observed in Hydro-Québec's Système de Mesure de Décalage Angulaire (SMDA) synchrophasor measurement system found to have a peak in the number of events around midnight. This was similar to diurnal rates of negative Bz geomagnetic impulsive events observed at nearby auroral zone magnetometers. Superposed epoch analysis demonstrates the impulses are regularly associated with increases in harmonic distortion observed at a nearby substation transformer. These large impulsive vertical geomagnetic perturbations appear to be local vortical ionospheric disturbances.

Original language	English
Article number	44
Journal	Journal of Space Weather and Space Climate
Volume	11
DOIs	https://doi.org/10.1051/swsc/2021029
Publication status	Published - 2021

Keywords

Auroral zone ionosphere
Geomagnetically induced currents
Impulsive geomagnetic events

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10.1051/swsc/2021029

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title = "Statistics of large impulsive magnetic events in the auroral zone",

abstract = "Impulsive geomagnetic variations, latitudinally localized to the auroral zone, have been observed from 2015 to 2020. These impulsive events have been observed mostly in the pre-midnight sector as upward vertical perturbations. Diurnal variations in geomagnetically-triggered harmonic distortion events observed in Hydro-Qu{\'e}bec's Syst{\`e}me de Mesure de D{\'e}calage Angulaire (SMDA) synchrophasor measurement system found to have a peak in the number of events around midnight. This was similar to diurnal rates of negative Bz geomagnetic impulsive events observed at nearby auroral zone magnetometers. Superposed epoch analysis demonstrates the impulses are regularly associated with increases in harmonic distortion observed at a nearby substation transformer. These large impulsive vertical geomagnetic perturbations appear to be local vortical ionospheric disturbances.",

keywords = "Auroral zone ionosphere, Geomagnetically induced currents, Impulsive geomagnetic events",

author = "Kyle Reiter and S{\'e}bastien Guillon and Martin Connors and Brian Jackel",

note = "Publisher Copyright: {\textcopyright} K. Reiter et al., Published by EDP Sciences 2021.",

year = "2021",

doi = "10.1051/swsc/2021029",

language = "English",

volume = "11",

}

TY - JOUR

T1 - Statistics of large impulsive magnetic events in the auroral zone

AU - Reiter, Kyle

AU - Guillon, Sébastien

AU - Connors, Martin

AU - Jackel, Brian

N1 - Publisher Copyright: © K. Reiter et al., Published by EDP Sciences 2021.

PY - 2021

Y1 - 2021

N2 - Impulsive geomagnetic variations, latitudinally localized to the auroral zone, have been observed from 2015 to 2020. These impulsive events have been observed mostly in the pre-midnight sector as upward vertical perturbations. Diurnal variations in geomagnetically-triggered harmonic distortion events observed in Hydro-Québec's Système de Mesure de Décalage Angulaire (SMDA) synchrophasor measurement system found to have a peak in the number of events around midnight. This was similar to diurnal rates of negative Bz geomagnetic impulsive events observed at nearby auroral zone magnetometers. Superposed epoch analysis demonstrates the impulses are regularly associated with increases in harmonic distortion observed at a nearby substation transformer. These large impulsive vertical geomagnetic perturbations appear to be local vortical ionospheric disturbances.

AB - Impulsive geomagnetic variations, latitudinally localized to the auroral zone, have been observed from 2015 to 2020. These impulsive events have been observed mostly in the pre-midnight sector as upward vertical perturbations. Diurnal variations in geomagnetically-triggered harmonic distortion events observed in Hydro-Québec's Système de Mesure de Décalage Angulaire (SMDA) synchrophasor measurement system found to have a peak in the number of events around midnight. This was similar to diurnal rates of negative Bz geomagnetic impulsive events observed at nearby auroral zone magnetometers. Superposed epoch analysis demonstrates the impulses are regularly associated with increases in harmonic distortion observed at a nearby substation transformer. These large impulsive vertical geomagnetic perturbations appear to be local vortical ionospheric disturbances.

KW - Auroral zone ionosphere

KW - Geomagnetically induced currents

KW - Impulsive geomagnetic events

UR - https://www.scopus.com/pages/publications/85113161196

U2 - 10.1051/swsc/2021029

DO - 10.1051/swsc/2021029

M3 - Journal Article

AN - SCOPUS:85113161196

VL - 11

JO - Journal of Space Weather and Space Climate

JF - Journal of Space Weather and Space Climate

M1 - 44

ER -

Statistics of large impulsive magnetic events in the auroral zone

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Keywords

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