Simulation of pulse-like ground motions during the 2015 Mw 8.3 Illapel earthquake with a new source model using corrected empirical Green's functions

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dc.catalogadoraba
dc.contributor.authorFernández Soto, Claudio
dc.contributor.authorNozu, Atsushi
dc.contributor.authorCrempien de la Carrera, Jorge Gustavo Federico
dc.contributor.authorLlera Martin, Juan Carlos de la
dc.date.accessioned2023-03-14T19:53:13Z
dc.date.available2023-03-14T19:53:13Z
dc.date.issued2022
dc.description.abstractPulse-like near-source ground motions were observed by the local network during the 2015 Mw 8.3 Illapel, Chile earthquake. Such ground motions can be quite damaging to a wide range of infrastructures. The primary objective of this study is to provide a source model that can explain such ground motions. The isolated nature of the pulses indicated that the rupture of some small isolated region on the fault contributed to the generation of the pulse. Therefore, we considered such regions and termed them as Strong Motion Pulse Generation Areas (SPGAs). We used the corrected empirical Green's function (EGF) method because this method has been successfully applied to near-source pulse-like ground motions in previous studies. We simulated synthetic waveforms using the frequency dependent quality factor Q = 239f0:71 and empirical site amplification factors, which we obtained by applying a generalized inversion technique to local weakmotion data. The result indicated that the observed ground motions from the Mw 8.3 Illapel earthquake can readily be explained with a source model that involves two SPGAs with dimensions of several kilometers in spite of the huge rupture zone of the earthquake. The source model can reproduce velocity waveforms, acceleration Fourier amplitude spectra (FAS) and pseudoacceleration response spectra. It also reproduces the duration of strong ground motions quite accurately. No significant bias was found with respect to distance and frequency. In conclusion, the corrected EGF method is a very efficient tool to simulate near-source ground motions of a subduction earthquake when it is combined with higher stress-drop subevents whose sizes are adjusted to the observed pulse widths.
dc.description.funderCentro de Investigacion para la Gestion Integrada del Riesgo de Desastres [CIGIDEN]
dc.description.funderAndean Geothermal Center of Excellence [CEGA]
dc.description.funderSImulation Based Earthquake Risk and Resilience of Interdependent Systems and NetworKs [SIBER-RISK]
dc.description.funderSouthern California Earthquake Center
dc.description.funderPIA
dc.description.funderANID/BECA DE DOCTORADO NACIONAL (National Agency for Research and Development)
dc.fechaingreso.objetodigital2023-03-14
dc.format.extent15 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1785/0220200446
dc.identifier.eissn1938-2057
dc.identifier.issn0895-0695
dc.identifier.urihttps://doi.org/10.1785/0220200446
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/66579
dc.identifier.wosidWOS:000734338700004
dc.information.autorucEscuela de Ingeniería; Fernandez Soto Claudio Andree; ; 14695
dc.information.autorucEscuela de Ingeniería; Crempien De La Carrera Jorge Gustavo Federico; 0000-0002-6626-6931; 1044475
dc.information.autorucEscuela de Ingeniería; De La Llera Martin Juan Carlos; 0000-0002-9064-0938; 53086
dc.issue.numero1
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final90
dc.pagina.inicio76
dc.publisherSEISMOLOGICAL SOC AMER
dc.revistaSeismological Research Letters
dc.rightsacceso restringido
dc.subjectTectonic stress
dc.subjectRupture process
dc.subjectS-wave
dc.subjectChile
dc.subjectFault
dc.subjectAttenuation
dc.subjectAftershocks
dc.subjectBuildings
dc.subjectDuration
dc.subjectSpectra
dc.subject.ddc620
dc.subject.deweyIngenieríaes_ES
dc.subject.ods11 Sustainable Cities and Communities
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleSimulation of pulse-like ground motions during the 2015 Mw 8.3 Illapel earthquake with a new source model using corrected empirical Green's functionses_ES
dc.typeartículo
dc.volumen93
sipa.codpersvinculados14695
sipa.codpersvinculados1044475
sipa.codpersvinculados53086
sipa.indexWoS
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