Precursory inflation of shallow magma reservoirs at west Sunda volcanoes detected by InSAR

Estelle Chaussard, Falk C Amelung

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

We use 2006-2009 ALOS Interferometric Synthetic Aperture Radar data over the entire west Sunda arc, Indonesia, home of 13% of the world's active volcanoes, to derive arc-wide time-dependent ground deformation data. We present unambiguous evidence of inflation at six volcanoes, three of which erupted after the observation period. We show that these volcanoes have shallow magma reservoirs at ∼1-3 km depth below the average regional elevation. A global comparison of reservoir depths at arc volcanoes suggests that volcanoes in extensional and strike-slip settings (west Sunda) can develop shallow reservoirs whereas volcanoes in compressional settings may lack them. Thus, magma ascend through the upper crust could be influenced by intra-arc tectonic settings.

Original languageEnglish (US)
Article numberL21311
JournalGeophysical Research Letters
Volume39
Issue number21
DOIs
StatePublished - 2012

Fingerprint

inflation
magma chamber
volcanoes
magma
volcano
arcs
Indonesia
ALOS
radar data
synthetic aperture radar
upper crust
tectonic setting
tectonics
crusts
slip

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Geophysics

Cite this

Precursory inflation of shallow magma reservoirs at west Sunda volcanoes detected by InSAR. / Chaussard, Estelle; Amelung, Falk C.

In: Geophysical Research Letters, Vol. 39, No. 21, L21311, 2012.

Research output: Contribution to journalArticle

@article{0722e765b78d413abdb6dcd2ac5d62c2,
title = "Precursory inflation of shallow magma reservoirs at west Sunda volcanoes detected by InSAR",
abstract = "We use 2006-2009 ALOS Interferometric Synthetic Aperture Radar data over the entire west Sunda arc, Indonesia, home of 13{\%} of the world's active volcanoes, to derive arc-wide time-dependent ground deformation data. We present unambiguous evidence of inflation at six volcanoes, three of which erupted after the observation period. We show that these volcanoes have shallow magma reservoirs at ∼1-3 km depth below the average regional elevation. A global comparison of reservoir depths at arc volcanoes suggests that volcanoes in extensional and strike-slip settings (west Sunda) can develop shallow reservoirs whereas volcanoes in compressional settings may lack them. Thus, magma ascend through the upper crust could be influenced by intra-arc tectonic settings.",
author = "Estelle Chaussard and Amelung, {Falk C}",
year = "2012",
doi = "10.1029/2012GL053817",
language = "English (US)",
volume = "39",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "21",

}

TY - JOUR

T1 - Precursory inflation of shallow magma reservoirs at west Sunda volcanoes detected by InSAR

AU - Chaussard, Estelle

AU - Amelung, Falk C

PY - 2012

Y1 - 2012

N2 - We use 2006-2009 ALOS Interferometric Synthetic Aperture Radar data over the entire west Sunda arc, Indonesia, home of 13% of the world's active volcanoes, to derive arc-wide time-dependent ground deformation data. We present unambiguous evidence of inflation at six volcanoes, three of which erupted after the observation period. We show that these volcanoes have shallow magma reservoirs at ∼1-3 km depth below the average regional elevation. A global comparison of reservoir depths at arc volcanoes suggests that volcanoes in extensional and strike-slip settings (west Sunda) can develop shallow reservoirs whereas volcanoes in compressional settings may lack them. Thus, magma ascend through the upper crust could be influenced by intra-arc tectonic settings.

AB - We use 2006-2009 ALOS Interferometric Synthetic Aperture Radar data over the entire west Sunda arc, Indonesia, home of 13% of the world's active volcanoes, to derive arc-wide time-dependent ground deformation data. We present unambiguous evidence of inflation at six volcanoes, three of which erupted after the observation period. We show that these volcanoes have shallow magma reservoirs at ∼1-3 km depth below the average regional elevation. A global comparison of reservoir depths at arc volcanoes suggests that volcanoes in extensional and strike-slip settings (west Sunda) can develop shallow reservoirs whereas volcanoes in compressional settings may lack them. Thus, magma ascend through the upper crust could be influenced by intra-arc tectonic settings.

UR - http://www.scopus.com/inward/record.url?scp=84869479605&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84869479605&partnerID=8YFLogxK

U2 - 10.1029/2012GL053817

DO - 10.1029/2012GL053817

M3 - Article

AN - SCOPUS:84869479605

VL - 39

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 21

M1 - L21311

ER -