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dc.contributor.authorten Brink, Uri S.
dc.contributor.authorLopez-Venegas, Alberto M.
dc.date.accessioned2012-06-20T17:48:07Z
dc.date.available2012-06-20T17:48:07Z
dc.date.issued2012-05-19
dc.identifier.citationGeophysical Research Letters 39 (2012): L10304en_US
dc.identifier.urihttp://hdl.handle.net/1912/5234
dc.descriptionThis paper is not subject to U.S. copyright. The definitive version was published in Geophysical Research Letters 39 (2012): L10304, doi:10.1029/2012GL051485.en_US
dc.description.abstractKinematic similarities between the Sumatra and Puerto Rico Trenches highlight the potential for a mega-earthquake along the Puerto Rico Trench and the generation of local and trans-Atlantic tsunamis. We used the horizontal components of continuous GPS (cGPS) measurements from 10 sites on NE Caribbean islands to evaluate strain accumulation along the North American (NA) – Caribbean (CA) plate boundary. These sites move westward and slightly northward relative to CA interior at rates ≤2.5 mm/y. Provided this motion originates in the subduction interface, the northward motion suggests little or no trench-perpendicular thrust accumulation and may in fact indicate divergence north of Puerto Rico, where abnormal subsidence, bathymetry, and gravity are observed. The Puerto Rico Trench, thus, appears unable to generate mega-earthquakes, but damaging smaller earthquakes cannot be discounted. The westward motion, characterized by decreasing rate with distance from the trench, is probably due to eastward motion of CA plate impeded at the plate boundary by the Bahamas platform. Two additional cGPS sites in Mona Passage and SW Puerto Rico move to the SW similar to Hispaniola and unlike the other 10 sites. That motion relative to the rest of Puerto Rico may have given rise to seismicity and normal faults in Mona Rift, Mona Passage, and SW Puerto Rico.en_US
dc.format.mimetypetext/plain
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttp://dx.doi.org/10.1029/2012GL051485
dc.subjectLesser Antillesen_US
dc.subjectPuerto Rico trenchen_US
dc.subjectVirgin Islandsen_US
dc.subjectEarthquake hazarden_US
dc.subjectSubduction zone couplingen_US
dc.subjectTsunami hazarden_US
dc.titlePlate interaction in the NE Caribbean subduction zone from continuous GPS observationsen_US
dc.typeArticleen_US
dc.identifier.doi10.1029/2012GL051485


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