Tectonic inversion in the Caribbean-South American plate boundary: GPS geodesy, seismology, and tectonics of the Mw 6.7 22 April 1997 Tobago earthquake

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dc.contributor.authorWeber, John C.
dc.contributor.authorGeirsson, Halldor
dc.contributor.authorLatchman, Joan L.
dc.contributor.authorShaw, Kenton
dc.contributor.authorLa Femina, Peter
dc.contributor.authorWdowinski, Shimon
dc.contributor.authorHiggins, Machel
dc.contributor.authorChurches, Christopher
dc.contributor.authorNorabuena Ortiz, Edmundo
dc.coverage.spatialTobago
dc.date.accessioned2018-09-10T19:53:37Z
dc.date.available2018-09-10T19:53:37Z
dc.date.issued2015-06
dc.description.abstractOn 22 April 1997 the largest earthquake recorded in the Trinidad‐Tobago segment of the Caribbean‐South American plate boundary zone (Mw 6.7) ruptured a shallow (~9 km), ENE striking (~250° azimuth), shallowly dipping (~28°) dextral‐normal fault ~10 km south of Tobago. In this study, we describe this earthquake and related foreshock and aftershock seismicity, derive coseismic offsets using GPS data, and model the fault plane and magnitude of slip for this earthquake. Coseismic slip estimated at our episodic GPS sites indicates movement of Tobago 135 ± 6 to 68 ± 6 mm NNE and subsidence of 7 ± 9 to 0 mm. This earthquake was anomalous and is of interest because (1) its large component of normal slip and ENE strike are unexpected given the active E‐W dextral shearing across the Caribbean‐South American plate boundary zone, (2) it ruptured a normal fault plane with a low (~28°) dip angle, and (3) it reactivated and inverted the preexisting Tobago terrrane‐South America ocean‐continent (thrust) boundary that formed during early Tertiary oblique plate convergence.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationWeber, J. C., Geirsson, H., Latchman, J. L., Shaw, K., La Femina, P., Wdowinski, S., ... Norabuena, E. (2015). Tectonic inversion in the Caribbean-South American plate boundary: GPS geodesy, seismology, and tectonics of the Mw 6.7 22 April 1997 Tobago earthquake.==$Tectonics, 34$==(6), 1181-1194. https://doi.org/10.1002/2014TC003665es_ES
dc.identifier.doihttps://doi.org/10.1002/2014TC003665es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalTectonicses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2900
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:0278-7407
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licences/by/4.0/es_ES
dc.subjectPlate tectonicses_ES
dc.subjectInversion tectonicses_ES
dc.subjectGPS geodesyes_ES
dc.subjectCaribbeanes_ES
dc.subjectSeismologyes_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.00es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.04es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.06es_ES
dc.titleTectonic inversion in the Caribbean-South American plate boundary: GPS geodesy, seismology, and tectonics of the Mw 6.7 22 April 1997 Tobago earthquakees_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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