Abstract
In this research, we have conducted a numerical simulation to obtain the seismic source, coseismic deformation field, and the tsunami propagation of the great Lima-Peru 1940 earthquake and tsunami, based on macroseismic information and focal mechanism from the literature. The seismic dimensions of our preferred model were set at 162 km×71 km according to VIII isoseismal intensity. The slip distribution is homogeneous with a mean value of 2.7 m. The fault plane orientation was set at strike = 330∘, dip = 20∘, and rake = 90∘. The maximum simulated uplift was 1.27 m and the maximum subsidence was 0.36 m. Due to the proximity of the seismic source to the coast, the city of Huacho was uplifted around 11 cm. The fault plane of the 1940 earthquake was located in the updip near the coast. The maximum tsunami height simulated in Huacho was 1.80 m. We suggest that there is a high tsunamigenic potential near the trench to generate a shallow earthquake.
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Acknowledgments
We are grateful to Mr. Christopher Hatch by the revision of the linguistic aspects of the manuscript.
Funding
This study was financially supported by a research grant from the Universidad Nacional Mayor de San Marcos and from Concytec (Consejo Nacional de Ciencia y Tecnología) of Peru.
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Jiménez, C., Moggiano, N. Numerical simulation of the 1940 Lima-Peru earthquake and tsunami (Mw 8.0). J Seismol 24, 89–99 (2020). https://doi.org/10.1007/s10950-019-09887-2
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DOI: https://doi.org/10.1007/s10950-019-09887-2