Auroral crackling sounds and Schumann resonances

Unto K. Laine*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

Observations of unusual sounds like claps, snaps, and cracklings from a serene sky under actively moving, bright aurora borealis have been reported during a long history. Since year 2000 the auroral sounds have been studied in Finland. In 2011 a sound source associated with the aurora was localized for the first time in the sky approximately 70 meters from the ground. To accommodate for the surprisingly low altitude of the source, a hypothesis that the sounds are produced by corona discharges in a temperature inversion layer at the observed altitude was published in 2016. The focus of the present paper is in the acoustic analysis of the crackling sounds that are sequences with complex temporal structures. It is shown that the sounds share similar rhythmical patterns, which are connected to the electromagnetic resonances in the atmosphere, also known as the Schumann resonances

Original languageEnglish
Title of host publicationProceedings of the 26th International Congress on Sound and Vibration, ICSV 2019
PublisherCanadian Acoustical Association
Number of pages8
ISBN (Electronic)9781999181000
Publication statusPublished - 7 Jul 2019
MoE publication typeA4 Article in a conference publication
EventInternational Congress on Sound and Vibration - Montreal, Canada
Duration: 7 Jul 201911 Jul 2019
Conference number: 26

Publication series

NameProceedings of the International Congress on Sound and Vibration
ISSN (Electronic)2329-3675

Conference

ConferenceInternational Congress on Sound and Vibration
Abbreviated titleICSV
CountryCanada
CityMontreal
Period07/07/201911/07/2019

Keywords

  • Auroral sounds
  • Geomagnetic storms
  • Schumann resonances

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    Laine, U. K. (2019). Auroral crackling sounds and Schumann resonances. In Proceedings of the 26th International Congress on Sound and Vibration, ICSV 2019 (Proceedings of the International Congress on Sound and Vibration). Canadian Acoustical Association. https://www.iiav.org/content/archives_icsv_last/2019_icsv26/content/papers/papers/full_paper_725_20190326192252831.pdf