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JDR Vol.18 No.4 pp. 308-318
(2023)
doi: 10.20965/jdr.2023.p0308

Paper:

Seismicity Based Maximum Magnitude Estimation of Subduction Earthquakes in Peru

Juan Carlos Tarazona*,† ORCID Icon, Zenon Aguilar* ORCID Icon, Nelson Pulido**, Carlos Gonzales* ORCID Icon, Fernando Lazares* ORCID Icon, and Hiroe Miyake***

*Japan Peru Center for Earthquake Engineering Research and Disaster Mitigation (CISMID), National University of Engineering (UNI)
Av. Tupac Amaru 1150, Lima 15333, Peru

Corresponding author

**National Research Institute for Earth Science and Disaster Resilience (NIED)
Tsukuba, Japan

***Earthquake Research Institute, The University of Tokyo
Tokyo, Japan

Received:
January 8, 2023
Accepted:
April 6, 2023
Published:
June 1, 2023
Keywords:
maximum magnitude, subduction earthquakes, seismogenic sources, interface and intraslab earthquakes, seismic zonation
Abstract

In seismic design, intensity parameters that represent seismic demand are commonly used. A probabilistic seismic hazard assessment is an accurate way of assessing seismic demand, based on a set of parameters that represent the seismicity of a region. However, because some regions lack sufficient information, the selection of these parameters can be controversial. In Peru, selecting a maximum earthquake magnitude (Mmax) for regional seismic hazard assessments has proven to be a challenging task due to the limited available information concerning of large-magnitude events. This study evaluated the Mmax for subduction earthquakes using scaling relationships, empirical evidence, and the extreme value statistics (Kijko and Bayesian) approach. The seismic catalog was updated to February 2022 and divided into 19 subduction seismic sources (5 interface and 14 intraslab). The results showed that the obtained Mmax are within the range of Mw 8.7–9.0 for the interface and Mw 7.6–8.1 for the intraslab sources, which unlike the Mmax values established in previous regional seismic hazard assessments, are more consistent with the historical and instrumental seismicity and rupture models.

Cite this article as:
J. Tarazona, Z. Aguilar, N. Pulido, C. Gonzales, F. Lazares, and H. Miyake, “Seismicity Based Maximum Magnitude Estimation of Subduction Earthquakes in Peru,” J. Disaster Res., Vol.18 No.4, pp. 308-318, 2023.
Data files:
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