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dc.contributor.author
Ruiz, Mario Z.
dc.contributor.author
Civilini, Francesco
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Ebinger, Cynthia J.
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Oliva, Sarah J.
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Ruiz, Mario C.
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Badi, Gabriela
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La Femina, Peter C.
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Casas, José Augusto
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dc.date.available
2023-02-07T13:22:19Z
dc.date.issued
2022-03
dc.identifier.citation
Ruiz, Mario Z.; Civilini, Francesco; Ebinger, Cynthia J.; Oliva, Sarah J.; Ruiz, Mario C.; et al.; Precursory Signal Detected for the 2018 Sierra Negra Volcanic Eruption, Galápagos, Using Seismic Ambient Noise; John Wiley & Sons; Journal of Geophysical Research: Solid Earth; 127; 3; 3-2022; 1-16
dc.identifier.issn
2169-9356
dc.identifier.uri
http://hdl.handle.net/11336/187152
dc.description.abstract
The changes in physical properties leading up to a volcanic eruption provide clues to processes occurring within volcanoes and may reveal premonitory signals. The Sierra Negra shield volcano, located in the Galápagos Islands, erupted on 26 June 2018 after months of continued inflation and escalating earthquake activity. We applied ambient noise interferometry to five months of continuous seismic data from 12 broadband stations to calculate crustal shear-wave velocity changes before and during the eruption. Using the Moving Window Cross-Spectral technique and a pre-eruption stack of ambient seismic data as reference, we found a −0.27% decrease in velocity 17 days before the eruption in station-pairs that pass beneath the caldera's north-eastern sector. Sensitivity kernels suggest that the velocity changes of this precursory signal are greatest at depths corresponding to the shallow sill (∼2 km) beneath the wide caldera. Our results, considered in light of geodetic, seismicity, and petrological results, suggest that this velocity decrease is in part caused by dilatation from a ML 4.8 earthquake, and degassing after a possible magma intrusion below or at the base of the sill. The precursory velocity decrease within the sill region offers an important tool for forecasting future eruptions at Sierra Negra.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
John Wiley & Sons
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
AMBIENT NOISE INTERFEROMETRY
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ERUPTION FORECASTING
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GALÁPAGOS
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VOLCANO MONITORING
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VOLCANO SEISMOLOGY
dc.subject.classification
Vulcanología
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Precursory Signal Detected for the 2018 Sierra Negra Volcanic Eruption, Galápagos, Using Seismic Ambient Noise
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-02-07T10:15:45Z
dc.journal.volume
127
dc.journal.number
3
dc.journal.pagination
1-16
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Ruiz, Mario Z.. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. University of Tulane; Estados Unidos
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Fil: Civilini, Francesco. California Institute of Technology; Estados Unidos
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Fil: Ebinger, Cynthia J.. University of Tulane; Estados Unidos
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Fil: Oliva, Sarah J.. University of Victoria; Canadá
dc.description.fil
Fil: Ruiz, Mario C.. Escuela Politécnica Nacional; Ecuador
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Fil: Badi, Gabriela. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
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Fil: La Femina, Peter C.. State University of Pennsylvania; Estados Unidos
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Fil: Casas, José Augusto. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Journal of Geophysical Research: Solid Earth
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021JB022990?af=R
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1029/2021JB022990
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