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

Mount Melbourne (74821? S, 164843? E) is a quiescent volcano located in 20 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 permafros...

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Bibliographic Details
Published in:Polar Research
Main Authors: Gambino, S., Aloisi, M., Falzone, G., Ferro, A.
Other Authors: Gambino, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia, Aloisi, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia, Falzone, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia, Ferro, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia, Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia
Format: Article in Journal/Newspaper
Language:English
Published: Co-Action Publishing 2016
Subjects:
Tilt monitoring
volcanic dynamics
10 physics volcanology
ground deformation
Victoria Land
04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous
Mount Melbourne
Antarc*
Antarctica
permafrost
Polar Research
Online Access:http://hdl.handle.net/2122/10498
https://doi.org/10.3402/polar.v35.28269
Description
Summary:Mount Melbourne (74821? S, 164843? E) is a quiescent volcano located in 20 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 25 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 30 the hypothesis that the volcanic edifice of Mount Melbourne is active and should be monitored multidisciplinarily. Published 28269 2V. Dinamiche di unrest e scenari pre-eruttivi JCR Journal open

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