Nighttime Magnetic Perturbation Events Observed in Arctic Canada: 3. Occurrence and Amplitude as Functions of Magnetic Latitude, Local Time, and Magnetic Disturbance Indices

Engebretson, Mark J.; Pilipenko, Viacheslav A.; Steinmetz, Erik S.; Moldwin, Mark B.; Connors, Martin G.; Boteler, David H.; Singer, Howard J.; Opgenoorth, Hermann; Schillings, Audrey; Ohtani, Shin; Gjerloev, Jesper; Russell, Christopher T.

doi:10.1029/2020sw002526

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Nighttime Magnetic Perturbation Events Observed in Arctic Canada: 3. Occurrence and Amplitude as Functions of Magnetic Latitude, Local Time, and Magnetic Disturbance Indices

2021
By Engebretson, Mark J. ; Pilipenko, Viacheslav A. ; Steinmetz, Erik S. ; ...
Source: Space Weather, 19(3)

[PDF-1.44 MB]

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Journal Title:

Space Weather
Personal Author:

Engebretson, Mark J. ; Pilipenko, Viacheslav A. ; Steinmetz, Erik S. ; Moldwin, Mark B. ; Connors, Martin G. ; ... More +

Engebretson, Mark J. ; Pilipenko, Viacheslav A. ; Steinmetz, Erik S. ; Moldwin, Mark B. ; Connors, Martin G. ; Boteler, David H. ; Singer, Howard J. ; Opgenoorth, Hermann ; Schillings, Audrey ; Ohtani, Shin ; Gjerloev, Jesper ; Russell, Christopher T. Less -
NOAA Program & Office:

NWS (National Weather Service) ; SWPC (Space Weather Prediction Center)

NWS (National Weather Service) ; SWPC (Space Weather Prediction Center) Less -
Description:

Rapid changes of magnetic fields associated with nighttime magnetic perturbation events (MPEs) with amplitudes |ΔB| of hundreds of nT and 5–10 min duration can induce geomagnetically induced currents (GICs) that can harm technological systems. This study compares the occurrence and amplitude of nighttime MPEs with |dB/dt| ≥ 6 nT/s observed during 2015 and 2017 at five stations in Arctic Canada ranging from 64.7° to 75.2° in corrected geomagnetic latitude (MLAT) as functions of magnetic local time (MLT), the SME (SuperMAG version of AE) and SYM/H magnetic indices, and time delay after substorm onsets. Although most MPEs occurred within 30 min after a substorm onset, ∼10% of
Keywords:

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Atmospheric Science
Source:

Space Weather, 19(3)
DOI:

https://doi.org/10.1029/2020sw002526
ISSN:

1542-7390;1542-7390;
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PDF
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American Geophysical Union (AGU)
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Journal Article
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https://creativecommons.org/licenses/by/4.0/
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CC BY
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urn:sha256:38b304a8bf713e959789ab9582401be289c0afff7bd803569c12cb044ca9de70
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https://repository.library.noaa.gov/view/noaa/53076/noaa_53076_DS1.pdf
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