Tilt signals at Mount Melbourne, Antarctica: evidence of a shallow volcanic source

Mount Melbourne (74°21' S, 164°43' E) is a quiescent volcano located in northern Victoria Land, Antarctica. Tilt signals have been recorded on Mount Melbourne since early 1989 by a permanent shallow borehole tiltmeter network comprising five stations. An overall picture of tilt, air and pe...

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Bibliographic Details
Published inPolar research Vol. 35; no. 1; pp. 1 - 9
Main Authors Gambino, Salvatore, Aloisi, Marco, Falzone, Giuseppe, Ferro, Angelo
Format Journal Article
LanguageEnglish
Published Spånga Open Academia 01.01.2016
Subjects
Boreholes
Deflation
Deformation
Deformation effects
Genetic algorithms
Geology
Geophysics
Global positioning systems
GPS
Magma
Permafrost
Stratigraphy
Volcanic activity
Volcanoes
Volcanology
New Zealand
United States > US
Mount Vesuvius
Transantarctic Mountains
Mount Etna
Antarctica
California
Long Valley
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Summary:Mount Melbourne (74°21' S, 164°43' E) is a quiescent volcano located in northern Victoria Land, Antarctica. Tilt signals have been recorded on Mount Melbourne since early 1989 by a permanent shallow borehole tiltmeter network comprising five stations. An overall picture of tilt, air and permafrost temperatures over 15 years of continuous recording data is reported. We focused our observations on long-term tilt trends that at the end of 1997 showed coherent changes at the three highest altitude stations, suggesting the presence of a ground deformation source whose effects are restricted to the summit area of Mount Melbourne. We inverted these data using a finite spherical body source, thereby obtaining a shallow deflation volume source located under the summit area. The ground deformation observed corroborates the hypothesis that the volcanic edifice of Mount Melbourne is active and should be monitored multidisciplinarily.
ISSN:0800-0395
1751-8369
DOI:10.3402/polar.v35.282691