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Empirical Frequency Content Models for Offshore Ground Motions in the Japan Trench Area

Hu, Jinjun / Cui, Xin / Tan, Jingyang

This paper presents empirical models for the frequency content parameters of offshore ground motions in the Japan Trench area based on the S-net dataset, comprising 6,436 recordings from 496 events. Significant variations in frequency content among shallow crustal, upper-mantle, subduction interface and subducting slab are revealed. Empirical models for To, Tavg, and Tm are proposed, considering moment magnitude, source distance, focal depth, and tectonic types. A comparative analysis with four existing land models highlights differences. Total residual results indicate that land models, based on shallow crustal datasets, tend to overestimate observed frequency content parameters in the Japan Trench area.

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Empirical Frequency Content Models for Offshore Ground Motions in the Japan Trench Area

Hu, Jinjun / Cui, Xin / Tan, Jingyang

This paper presents empirical models for the frequency content parameters of offshore ground motions in the Japan Trench area based on the S-net dataset, comprising 6,436 recordings from 496 events. Significant variations in frequency content among shallow crustal, upper-mantle, subduction interface and subducting slab are revealed. Empirical models for To, Tavg, and Tm are proposed, considering moment magnitude, source distance, focal depth, and tectonic types. A comparative analysis with four existing land models highlights differences. Total residual results indicate that land models, based on shallow crustal datasets, tend to overestimate observed frequency content parameters in the Japan Trench area.

Empirical Frequency Content Models for Offshore Ground Motions in the Japan Trench Area

Hu, Jinjun / Cui, Xin / Tan, Jingyang

This paper presents empirical models for the frequency content parameters of offshore ground motions in the Japan Trench area based on the S-net dataset, comprising 6,436 recordings from 496 events. Significant variations in frequency content among shallow crustal, upper-mantle, subduction interface and subducting slab are revealed. Empirical models for To, Tavg, and Tm are proposed, considering moment magnitude, source distance, focal depth, and tectonic types. A comparative analysis with four existing land models highlights differences. Total residual results indicate that land models, based on shallow crustal datasets, tend to overestimate observed frequency content parameters in the Japan Trench area.

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Title:

Empirical Frequency Content Models for Offshore Ground Motions in the Japan Trench Area

Contributors:

Hu, Jinjun (author) / Cui, Xin (author) / Tan, Jingyang (author)

Published in:

Journal of Earthquake Engineering ; 28 ; 2464-2489

Publication date:

2024-07-03

Size:

26 pages

ISSN:

1363-2469 , 1559-808X

DOI:

https://doi.org/10.1080/13632469.2024.2317340

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

S-net , offshore ground motions , frequency-content parameters , empirical models , Japan Trench

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