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Tomographic Imaging of the Agung-Batur Volcano Complex, Bali, Indonesia, From the Ambient Seismic Noise Field

Zulfakriza, Z.; Nugraha, Andri Dian; Widiyantoro, Sri; Cummins, Phil; Sahara, David P.; Rosalia, Shindy; Priyono, Awali; Kasbani, Kasbani; Syahbana, Devy K.; Priambodo, Imam C.; Martanto, Martanto; Ardianto, Ardianto

Description

The Agung-Batur Volcanic Complex (ABVC), part of the Sunda volcanic arc, is the source of some of the most hazardous volcanic activity in Indonesia. The ABVC has undergone many small (VEI 1-2) eruptions since historical records began in the early 19th century, but Mt. Agung has experienced much larger (VEI 5) eruptions, both in the modern (1963) and historical (1843) eras, as well as several times during the past 2000-3000 years. The 1963 eruption caused more than 1000 deaths, and a more recent...[Show more]

dc.contributor.authorZulfakriza, Z.
dc.contributor.authorNugraha, Andri Dian
dc.contributor.authorWidiyantoro, Sri
dc.contributor.authorCummins, Phil
dc.contributor.authorSahara, David P.
dc.contributor.authorRosalia, Shindy
dc.contributor.authorPriyono, Awali
dc.contributor.authorKasbani, Kasbani
dc.contributor.authorSyahbana, Devy K.
dc.contributor.authorPriambodo, Imam C.
dc.contributor.authorMartanto, Martanto
dc.contributor.authorArdianto, Ardianto
dc.date.accessioned2021-01-08T00:46:34Z
dc.date.available2021-01-08T00:46:34Z
dc.identifier.issn2296-6463
dc.identifier.urihttp://hdl.handle.net/1885/219243
dc.description.abstractThe Agung-Batur Volcanic Complex (ABVC), part of the Sunda volcanic arc, is the source of some of the most hazardous volcanic activity in Indonesia. The ABVC has undergone many small (VEI 1-2) eruptions since historical records began in the early 19th century, but Mt. Agung has experienced much larger (VEI 5) eruptions, both in the modern (1963) and historical (1843) eras, as well as several times during the past 2000-3000 years. The 1963 eruption caused more than 1000 deaths, and a more recent eruption in 2017 caused the evacuation of 140,000 people. Delineating the magma structure beneath ABVC is an important first step in understanding the physics of these eruptions. This paper presents the first local-scale study of Rayleigh wave group velocity structure and the seismic velocity structure beneath the ABVC using ambient seismic noise tomography. Seismic data were collected using 25 seismometers deployed across the ABVC during early January to March 2019. The local seismic network provides good resolution beneath both Mt. Agung and Mt. Batur. We obtained 158 Rayleigh Green's Functions, extracted by cross correlating noise simultaneously recorded at available station pairs. We used sub-space inversion to calculate group velocity at different periods and to estimate the lateral variations in group velocity for given periods. 2-D tomographic maps obtained from the inversion of the group velocity of Rayleigh waves clearly showed some pronounced velocity anomalies beneath the ABVC. We applied the Neighbourhood Algorithm (NA) technique to invert the Rayleigh wave dispersion curves to obtain shear wave velocity (Vs) vs. depth profiles. These profiles indicate a low Vs of about 1 km/s underlying the volcanic complex between Mt. Agung and Mt. Batur at depths up to 2 km, which we suggest is due to a combination of low-Vs volcanic deposits as well as a shallow hydrothermal fluids system associated with magma fluids and/or gases produced by magma intrusion at depths >7 km.
dc.description.sponsorshipThis work was supported by the USAID’s PEER (Partnership for Enhance Engagement in Research) program with agreement number AID-OAA-A-11-00012, partially supported by P3MI of Global Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology 2019 awarded to ZZ. 20 of the instrument sets used in the Agung Seismic Experiment were from the Australia-Indonesia Tectonics Observatory, funded by the Australian National University Major Equipment Committee Grant 17MEC33.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherFrontiers Research Foundation
dc.rightsCopyright © 2020 Zulfakriza, Nugraha, Widiyantoro, Cummins, Sahara, Rosalia, Priyono, Kasbani, Syahbana, Priambodo, Martanto, Ardianto, Husni, Lesmana, Kusumawati and Prabowo.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceFrontiers in Earth Science
dc.subjectAgung Volcano
dc.subjectBali-Indonesia
dc.subjectcross correlation
dc.subjectRayleigh wave
dc.subjectambient seismic noise tomography
dc.titleTomographic Imaging of the Agung-Batur Volcano Complex, Bali, Indonesia, From the Ambient Seismic Noise Field
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume8
dc.date.issued2020
local.identifier.absfor040604 - Natural Hazards
local.identifier.absfor040407 - Seismology and Seismic Exploration
local.identifier.ariespublicationa383154xPUB10759
local.publisher.urlhttp://frontiersin.org/Earth_Science
local.type.statusPublished Version
local.contributor.affiliationZulfakriza, Z., Institute of Technology Bandung
local.contributor.affiliationNugraha, Andri Dian, Institute of Technology Bandung
local.contributor.affiliationWidiyantoro, Sri, Bandung Institute of Technology
local.contributor.affiliationCummins, Phil, College of Science, ANU
local.contributor.affiliationSahara, David P., Bandung Institute of Technology
local.contributor.affiliationRosalia, Shindy, Institute of Technology Bandung
local.contributor.affiliationPriyono, Awali, Bandung Institute of Technology
local.contributor.affiliationKasbani, Kasbani, Ministry of Energy and Mineral Resources
local.contributor.affiliationSyahbana, Devy K., Ministry of Energy and Mineral Resources
local.contributor.affiliationPriambodo, Imam C., Ministry of Energy and Mineral Resources
local.contributor.affiliationMartanto, Martanto, Ministry of Energy and Mineral Resources
local.contributor.affiliationArdianto, Ardianto, Ministry of Energy and Mineral Resources
local.bibliographicCitation.issue43
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage11
local.identifier.doi10.3389/feart.2020.00043
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciences
dc.date.updated2020-11-02T04:16:37Z
dcterms.accessRightsOpen Access
dc.provenanceCopyright © 2020 Zulfakriza, Nugraha, Widiyantoro, Cummins, Sahara, Rosalia, Priyono, Kasbani, Syahbana, Priambodo, Martanto, Ardianto, Husni, Lesmana, Kusumawati and Prabowo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
dc.rights.licenseCreative Commons Attribution License (CC BY)
CollectionsANU Research Publications

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