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dc.creatorLiu, Chengli
dc.creatorZheng, Yong
dc.creatorXiong, Xiong
dc.creatorWang, Rongjiang
dc.creatorLópez Saborío, Allan
dc.creatorLi, Jun
dc.date.accessioned2018-07-20T14:07:25Z
dc.date.available2018-07-20T14:07:25Z
dc.date.issued2015-08-17
dc.identifier.citationhttps://academic.oup.com/gji/article/203/1/175/582112es_ES
dc.identifier.issn0956-540X
dc.identifier.issn1365-246X
dc.identifier.urihttp://hdl.handle.net/10669/75228
dc.description.abstractOn 2012 September 5, the anticipated interplate thrust earthquake ruptured beneath the Nicoya peninsula in northwestern Costa Rica close to the Middle America trench, with a magnitude Mw 7.6. Extensive co-seismic observations were provided by dense near-field strong ground motion, Global Positioning Systems (GPS) networks and teleseismic recordings from global seismic networks. The wealthy data sets available for the 2012 Mw 7.6 Nicoya earthquake provide a unique opportunity to investigate the details of the rupture process of this earthquake. By implementing a non-linear joint inversion with high-rate GPS waveform, more static GPS offsets, strong-motion data and teleseismic body waveform, we obtained a robust and accurate rupture model of the 2012 Mw 7.6 Nicoya earthquake. The earthquake is dominantly a pure thrust component with a maximum slip of 3.5 m, and the main large slip patch is located below the hypocentre, spanning ∼50 km along dip and ∼110 km along strike. The static stress drop is about 3.4 MPa. The total seismic moment of our preferred model is 3.46 × 1020 N m, which gives Mw = 7.6. Due to the fast rupture velocity, most of the seismic moment was released within 70 s. The largest slip patch directly overlaps the interseismic locked region identified by geodetic observations and extends downdip to the intersection with the upper plate Moho. We also find that there is a complementary pattern between the distribution of aftershocks and the co-seismic rupture; most aftershocks locate in the crust of the upper plate and are possibly induced by the stress change caused by the large slip patch.es_ES
dc.description.sponsorshipExcellent Young Scientists Fund/[2012FFA026]//Chinaes_ES
dc.description.sponsorshipNational Natural Science Foundation of China/[41422401]/NSFC/Chinaes_ES
dc.description.sponsorshipNational Natural Science Foundation of China/[41321063]/NSFC/Chinaes_ES
dc.description.sponsorshipChinese Earthquake Administration/[20130801]/CEA/Chinaes_ES
dc.language.isoen_USes_ES
dc.sourceGeophysical Journal International, vol.203,pp.175–183es_ES
dc.subjectSeismic cyclees_ES
dc.subjectEarthquake ground motionses_ES
dc.subjectEarthquake source observationses_ES
dc.subjectSeismicity and tectonicses_ES
dc.subjectBody waveses_ES
dc.subjectSubduction zone processeses_ES
dc.titleRupture processes of the 2012 September 5 Mw 7.6 Nicoya, Costa Rica earthquake constrained by improved geodetic and seismological observationses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.typeArtículo científicoes_ES
dc.identifier.doi10.1093/gji/ggv295
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigación en Ciencias Geológicas (CICG)es_ES


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