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Periodicity in volcanic gas plumes: A review and analysis

Published version
Peer-reviewed

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Type

Article

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Authors

Pering, TD 
Ilanko, T 
Liu, EJ 

Abstract

jats:pPersistent non-explosive passive degassing is a common characteristic of active volcanoes. Distinct periodic components in measurable parameters of gas release have been widely identified over timescales ranging from seconds to months. The development and implementation of high temporal resolution gas measurement techniques now enables the robust quantification of high frequency processes operating on timescales comparable to those detectable in geophysical datasets. This review presents an overview of the current state of understanding regarding periodic volcanic degassing, and evaluates the methods available for detecting periodicity, e.g., autocorrelation, variations of the Fast Fourier Transform (FFT), and the continuous wavelet transform (CWT). Periodicities in volcanic degassing from published studies were summarised and statistically analysed together with analyses of literature-derived datasets where periodicity had not previously been investigated. Finally, an overview of current knowledge on drivers of periodicity was presented and discussed in the framework of four main generating categories, including: (1) non-volcanic (e.g., atmospheric or tidally generated); (2) gas-driven, shallow conduit processes; (3) magma movement, intermediate to shallow storage zone; and (4) deep magmatic processes.</jats:p>

Description

Keywords

37 Earth Sciences, 3705 Geology, 3706 Geophysics

Journal Title

Geosciences (Switzerland)

Conference Name

Journal ISSN

2076-3263
2076-3263

Volume Title

9

Publisher

MDPI AG
Sponsorship
Leverhulme Trust (ECF-2017-063)
Isaac Newton Trust (17.08(h))