A horizontal ground-motion model for crustal and subduction earthquakes in Taiwan. Issue 2 (May 2020)

• Record Type: Journal Article
• Authors: Chao, Shu-Hsien; Chiou, Brian; Hsu, Chiao-Chu; Lin, Po-Shen
• Is Part Of: Earthquake spectra. Volume 36:Issue 2(2020)
• Page Start: 463
• Page End: 506
• Publication Date: 2020-05
• Subjects: Ground motion prediction equation -- random truncation -- single-station sigma -- crustal -- subduction; Earthquake engineering -- Periodicals; Earthquake engineering; Periodicals; 624.1762
• DOI: 10.1177/8755293019891711
• Languages: English
• ISSNs: 8755-2930

Abstract

In this study, a new horizontal ground-motion model is developed for crustal and subduction earthquakes in Taiwan. A novel two-step maximum-likelihood method is used as a regression tool to develop this model. This method simultaneously considers both the correlation between records and the biased sampling because of random truncation. Moreover, additional ground-motion data can be considered to derive more reliable analysis results. The functional form of the proposed ground-motion model is constructed using the response spectrum of the reference ground-motion scenario and different scalings of the source, path, and site to illustrate the ground-motion characteristics. The variabilities in the ground-motion intensity that result from different events, stations, and records are developed individually to derive a single-station sigma. The proposed ground-motion model may be useful for predicting ground-motion intensity and performing site-specific probabilistic seismic hazard analysis in Taiwan.