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An earthquake classification scheme adapted for Japan determined by the goodness of fit for ground-motion prediction equations

John X. Zhao, Zhou Shuanglin, Gao Pingjun, Yap Long, Zhang Yingbin, Hong Kie Thio, Lu Ming and David A. Rhoades
An earthquake classification scheme adapted for Japan determined by the goodness of fit for ground-motion prediction equations
Bulletin of the Seismological Society of America (September 2015) 105 (5): 2750-2763

Abstract

Establishing a set of ground-motion prediction equations (GMPEs) for Japan requires earthquake source categories in the dataset. Earthquakes are typically divided into three groups: shallow crustal events that occur in the Earth's crust, subduction interface events that occur at the interface between the crust or mantle and the subducting plate, and the subduction slab events that occur within the subducting plate. In the present study, we compared the hypocentral locations published in the catalogs of the International Seismological Centre/Engdahl-van der Hilst-Buland (ISC-EHB; Engdahl et al., 1998), the Japan Meteorological Agency (JMA), and the National Earthquake Information Center (NEIC) of the U.S. Geological Survey (USGS).The hypocentral location for the same earthquake varies significantly from one catalog to another. We used the subduction interface model from the USGS, Slab 1.0, to help guide the classification. We designed four classification schemes using locations from these three catalogs. We then fitted a set of random effects models to the strong-motion dataset from these earthquakes to assess the merits of the classification schemes. Our results showed that using ISC-EHB locations for events before 2005, and then using the preference order of catalogs as (1) JMA locations with high precision levels, (2) ISC-EHB, and (3) NEIC (excluding the events with a fixed depth) for events since 2005, together with some conditions for subduction interface events, produced the best GMPEs in terms of the maximum log likelihood. We also found that having a separate group for the earthquakes above the subduction interface, but with a depth over 25 km, improved the goodness of fit of the GMPEs.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 105
Serial Issue: 5
Title: An earthquake classification scheme adapted for Japan determined by the goodness of fit for ground-motion prediction equations
Affiliation: Southwest Jiaotong University, Laboratory of Transportation Tunnel Engineering, Ministry of Education, Chengdu, China
Pages: 2750-2763
Published: 20150915
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 27
Accession Number: 2015-099299
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 6 tables, sketch maps
N30°00'00" - N45°00'00", E129°00'00" - E147°00'00"
Secondary Affiliation: AECOM, USA, United StatesChina Earthquake Administration, CHN, ChinaGNS Sciences, NZL, New Zealand
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201542
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