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Authordc.contributor.authorRuiz Tapia, Sergio 
Authordc.contributor.authorKausel Vecchiola, Edgar es_CL
Authordc.contributor.authorCampos Muñoz, Jaime es_CL
Authordc.contributor.authorSaragoni, G. R. es_CL
Authordc.contributor.authorMadariaga, R. es_CL
Admission datedc.date.accessioned2012-01-02T18:02:07Z
Available datedc.date.available2012-01-02T18:02:07Z
Publication datedc.date.issued2011
Cita de ítemdc.identifier.citationPure Appl. Geophys. 168 (2011), 125–139es_CL
Identifierdc.identifier.otherDOI 10.1007/s00024-010-0117-x
Identifierdc.identifier.urihttps://repositorio.uchile.cl/handle/2250/125566
General notedc.descriptionArtículo de publicación ISIes_CL
Abstractdc.description.abstractThe Chilean subduction zone is one of the most active of the world with M = 8 or larger interplate thrust earthquakes occurring every 10 years or so on the average. The identification and characterization of pulses propagated from dominant asperities that control the rupture of these earthquakes is an important problem for seismology and especially for seismic hazard assessment since it can reduce the earthquake destructiveness potential. A number of studies of large Chilean earthquakes have revealed that the source time functions of these events are composed of a number of distinct energy arrivals. In this paper, we identify and characterize the high frequency pulses of dominant asperities using near source strong motion records. Two very well recorded interplate earthquakes, the 1985 Central Chile (Ms = 7.8) and the 2007 Tocopilla (Mw = 7.7), are considered. In particular, the 2007 Tocopilla earthquake was recorded by a network with absolute time and continuos recording. From the study of these strong motion data it is possible to identify the arrival of large pulses coming from different dominant asperities. The recognition of the key role of dominant asperities in seismic hazard assessment can reduce overestimations due to scattering of attenuation formulas that consider epicentral distance or shortest distance to the fault rather than the asperity distance. The location and number of dominant asperities, their shape, the amplitude and arrival time of pulses can be one of the principal factors influencing Chilean seismic hazard assessment and seismic design. The high frequency pulses identified in this paper have permitted us to extend the range of frequency in which the 1985 Central Chile and 2007 Tocopilla earthquakes were studied. This should allow in the future the introduction of this seismological result in the seismic design of earthquake engineering.es_CL
Patrocinadordc.description.sponsorshipThis research has been partially funded by Millennium Nucleus Program ‘‘Montessus de Ballore—IERC’’, Mideplan, Chile.es_CL
Lenguagedc.language.isoenes_CL
Títulodc.titleIdentification of High Frequency Pulses from Earthquake Asperities Along Chilean Subduction Zone Using Strong Motiones_CL
Document typedc.typeArtículo de revista


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