Relation Between Oceanic Plate Structure, Patterns of Interplate Locking and Microseismicity in the 1922 Atacama Seismic Gap

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dc.contributor.authorGonzalez-Vidal, Diego
dc.contributor.authorMoreno, Marcos
dc.contributor.authorSippl, Christian
dc.contributor.authorBaez, Juan Carlos
dc.contributor.authorOrtega-Culaciati, Francisco
dc.contributor.authorLange, Dietrich
dc.contributor.authorTilmann, Frederik
dc.contributor.authorSocquet, Anne
dc.contributor.authorBolte, Jan
dc.contributor.authorHormazabal, Joaquin
dc.contributor.authorLanglais, Mickael
dc.contributor.authorMorales-Yanez, Catalina
dc.contributor.authorMelnick, Daniel
dc.contributor.authorBenavente, Roberto
dc.contributor.authorMuenchmeyer, Jannes
dc.contributor.authorAraya, Rodolfo
dc.contributor.authorHeit, Benjamin
dc.date.accessioned2025-01-20T20:08:05Z
dc.date.available2025-01-20T20:08:05Z
dc.date.issued2023
dc.description.abstractWe deployed a dense geodetic and seismological network in the Atacama seismic gap in Chile. We derive a microseismicity catalog of >30,000 events, time series from 70 GNSS stations, and utilize a transdimensional Bayesian inversion to estimate interplate locking. We identify two highly locked regions of different sizes whose geometries appear to control seismicity patterns. Interface seismicity concentrates beneath the coastline, just downdip of the highest locking. A region with lower locking (27.5 & DEG;S-27.7 & DEG;S) coincides with higher seismicity levels, a high number of repeating earthquakes and events extending toward the trench. This area is situated where the Copiapo Ridge is subducted and has shown previous indications of both seismic and aseismic slip, including an earthquake sequence in 2020. While these findings suggest that the structure of the downgoing oceanic plate prescribes patterns of interplate locking and seismicity, we note that the Taltal Ridge further north lacks a similar signature.
dc.fuente.origenWOS
dc.identifier.doi10.1029/2023GL103565
dc.identifier.eissn1944-8007
dc.identifier.issn0094-8276
dc.identifier.urihttps://doi.org/10.1029/2023GL103565
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91867
dc.identifier.wosidWOS:001041264100001
dc.issue.numero15
dc.language.isoen
dc.revistaGeophysical research letters
dc.rightsacceso restringido
dc.subjectAtacama 1922 seismic gap
dc.subjectChile
dc.subjectGNSS
dc.subjectinterplate locking
dc.subjectlocking degree
dc.subjectseismic catalog
dc.subject.ods11 Sustainable Cities and Communities
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleRelation Between Oceanic Plate Structure, Patterns of Interplate Locking and Microseismicity in the 1922 Atacama Seismic Gap
dc.typeartículo
dc.volumen50
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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