Investigating Dunedin whistlers using volcanic lightning

Claire Antel, Andrew B. Collier, János Lichtenberger, Craig J. Rodger

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Whistlers detected at Dunedin, New Zealand are an anomaly: there is little lightning around Dunedin's conjugate point yet whistlers appear in relatively large numbers. These surplus whistlers have consequently inspired investigations into their origins. Dunedin's lightning-sparse conjugate point lies in the Aleutian Islands, a region populated with active volcanoes. Their presence has allowed us to perform a novel analysis: the correlation of whistlers to volcanic lightning. We report on our investigation, which successfully yielded the first observations of "volcanic whistlers." It was found that the single July 2008 Mount Okmok eruption had an impressive effect on the number of whistlers at Dunedin. The eruptions at Mount Redoubt in 2009 also caused a sporadic flow of whistlers in Dunedin. Key Points A new method is used to deduce location and time of whistler lightning source Volcanic lightning can generate whistlers Volcanic lightning strokes have been individually linked to whistlers

Original languageEnglish
Pages (from-to)4420-4426
Number of pages7
JournalGeophysical Research Letters
Volume41
Issue number13
DOIs
Publication statusPublished - Jul 16 2014

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Keywords

  • Dunedin
  • Mount Okmok
  • Mount Redoubt
  • New Zealand
  • volcanic lightning
  • whistlers

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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