dc.contributor.authorTan, Chiou Ting
dc.contributor.authorTaisne, Benoît
dc.contributor.authorNeuberg, Jurgen
dc.contributor.authorAhmad Basuki
dc.identifier.citationTan, C. T., Taisne, B., Neuberg, J., & Ahmad Basuki. (2019). Real-time assessment of potential seismic migration within a monitoring network using Red-flag SARA. Journal of Volcanology and Geothermal Research, 384, 31-47. doi:10.1016/j.jvolgeores.2019.07.004en_US
dc.description.abstractMagma opening new fluid pathways through the crust can generate migrating seismic sources following the trail of the magma. By using Seismic Amplitude Ratio Analysis (SARA), it is possible to detect this seismic migration simply from the amplitudes of continuous data recorded at different stations in a network, without having to do any picking of seismic phases. In this study, we present a modified method – Red-flag SARA, which adapts SARA for real-time monitoring. Red-flag SARA provides a quantitative tool to analyse amplitude ratios between stations in a network and detect temporal changes in these ratios. Since such changes imply seismic source location variations, Red-flag SARA is a handy tool during seismic crises to quickly answer the question of whether seismic activity, and therefore magma, is migrating or not. We tested Red-flag SARA on synthetic data and validated it using real data from two volcanoes – Piton de la Fournaise, Reunion Island, and Gede, Indonesia, for three scenarios: 1) magma migration ending as intrusion, 2) migration leading to eruption and 3) a burst of seismicity with no magma migration.en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.format.extent17 p.en_US
dc.relation.ispartofseriesJournal of Volcanology and Geothermal Researchen_US
dc.rights© 2019 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)en_US
dc.subjectMagma Migrationen_US
dc.subjectReal-time Monitoringen_US
dc.titleReal-time assessment of potential seismic migration within a monitoring network using Red-flag SARAen_US
dc.typeJournal Article
dc.contributor.researchEarth Observatory of Singaporeen_US
dc.contributor.schoolAsian School of the Environmenten_US
dc.description.versionPublished versionen_US

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