Three-dimensional attenuation (Qs) structure beneath the Kanto district, Japan, as inferred from strong motion records

Ryoichi Nakamura, Kenji Satake, Shinji Toda, Tomiichi Uetake, Shin'ichiro Kamiya

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

The three-dimensional (3D) S-wave attenuation (Qs) structure beneath the Kanto plain, where the Pacific and Philippine Sea plates subduct, was estimated using strong-motion records of the K-NET and KiK-net. In addition to several low-Qs zones corresponding to the volcanic front, a large NW-SE trending low-Qs zone is estimated under the non-volcanic Kanto area at depths of 20-60 km. This zone corresponds to a previously identified low-velocity (both Vp and Vs) zone with a high Poisson's ratio at 40-km depth; it further indicates a wedge immediately above the subducting Philippine Sea plate. Predicted seismic ground motions using the estimated 3D attenuation structure is very similar to the actually recorded by recent earthquake on July 2005

Original languageEnglish
Article numberL21304
JournalGeophysical Research Letters
Volume33
Issue number21
DOIs
Publication statusPublished - 2006 Nov 1
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'Three-dimensional attenuation (Qs) structure beneath the Kanto district, Japan, as inferred from strong motion records'. Together they form a unique fingerprint.

Cite this