Propagation Characteristics of Long-period Ground Motion in the Kanto Plain and Variation due to Source Location

• TERASHIMA Yoshihiro

  Takenaka Research & Development Institute

• FUKUWA Nobuo

  Disaster Mitigation Research Center, Nagoya University

Bibliographic Information

Other Title

• 関東平野における長周期地震動の伝播特性と震源位置による変動

Abstract

According to previous studies, in the sedimentary plain on the irregular bedrock such as the Kanto basin, Japan, the amplitude, duration, and predominant period of observed long-period ground motions vary with the hypocenter location due to the difference of the propagation path. In this paper, we investigated the propagation path effects (the relationship between amplitude and phase characteristics and epicenter distance) and the propagation path of surface wave recorded in and around the Kanto Basin. As a result, there were variations in path effects depending on the source location, period, and component. One of the causes of this variations was that the location where surface waves are concentrated differs depending on the source location. Furthermore, surface waves were likely to be concentrated the locations where the basin edge surrounds the inside of the plain and near the basin edge reflecting and refracting surface waves.

Journal

• Journal of Japan Association for Earthquake Engineering

  Journal of Japan Association for Earthquake Engineering 19 (6), 6_16-6_35, 2019

  JAPAN ASSOCIATION FOR EARTHQUAKE ENGINEERING

Keywords

• Long-period ground motion
• Source location
• Path effect
• Attenuation
• the Kanto Basin, Japan

Details

• CRID: 1390282752356710144
• NII Article ID: 130007739789
• DOI: 10.5610/jaee.19.6_16
• ISSN: 18846246
• Web Site: https://www.jstage.jst.go.jp/article/jaee/19/6/19_6_16/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed