Seismic Source of 1966 Huacho Peru Earthquake (Mw 8.1) from Tsunami Waveform Inversion

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dc.contributor.authorJimenez, Cesar
dc.contributor.authorCarbonel, Carlos
dc.contributor.authorVillegas-Lanza, J. C.
dc.contributor.authorQuiroz, Marco
dc.contributor.authorWang, Yuchen
dc.date.accessioned2025-01-20T20:21:04Z
dc.date.available2025-01-20T20:21:04Z
dc.date.issued2023
dc.description.abstractIn this research we estimated the slip distribution of the 1966 Huacho Peru earthquake, by inverting tsunami waveforms. This event took place offshore the central Peru region and produced severe ground shaking in the cities of Supe and Huacho, with intensities of VIII MM, leading to 100 fatalities. The coseismic seabed deformation produced by the earthquake triggered a regional tsunami that inundated some coastal areas, with major effects in Casma and Tortugas. We used the tsunami waveforms from three tidal stations located in Chimbote, Callao and Marcona, to obtain the parameters of the seismic source through an inversion process, whereby we compared the simulated and observed waveforms using the non-negative least square approach. Our results show a dislocation with a maximum slip of 5.5 m located around the epicentre. This implies that the asperity with maximum energy release was located offshore Barranca city. The seismic moment was calculated as 2.05x10(21) Nm, which is equivalent to a moment magnitude of 8.1 Mw. We suggest that there is a high potential for the generation of a tsunamigenic earthquake in the central region of Peru, despite the occurrence of the 1966 Peruvian earthquake, because this earthquake (together with the 1940, 1974 and 2007 earthquakes) has only released around the 20% of the energy accumulated from the 1746 earthquake (Mw9.0).
dc.fuente.origenWOS
dc.identifier.doi10.1007/s00024-022-03132-7
dc.identifier.eissn1420-9136
dc.identifier.issn0033-4553
dc.identifier.urihttps://doi.org/10.1007/s00024-022-03132-7
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92611
dc.identifier.wosidWOS:000844208700001
dc.issue.numero5
dc.language.isoen
dc.pagina.final1693
dc.pagina.inicio1679
dc.revistaPure and applied geophysics
dc.rightsacceso restringido
dc.subjectEarthquake
dc.subjecttsunami
dc.subjectwaveform inversion
dc.subjectnumerical simulation
dc.subject.ods11 Sustainable Cities and Communities
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleSeismic Source of 1966 Huacho Peru Earthquake (Mw 8.1) from Tsunami Waveform Inversion
dc.typeartículo
dc.volumen180
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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