Constructing a system to explore shallow velocity structures using a miniature microtremor array

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  • CHO Ikuo
    Research Institute of Geology and Geoinformation, AIST
  • SENNA Shigeki
    Disaster Risk Research Unit, Department of Integrated Research on Disaster Prevention, NIED

Bibliographic Information

Other Title
  • 極小微動アレイによる浅部構造探査システム
  • 極小微動アレイによる浅部構造探査システム : 大量データの蓄積と利活用に向けて
  • キョクショウ ビドウ アレイ ニ ヨル センブ コウゾウ タンサ システム : タイリョウ データ ノ チクセキ ト リ カツヨウ ニ ムケテ
  • ―大量データの蓄積と利活用に向けて―
  • — Accumulating and utilizing large microtremor datasets —

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Abstract

Our final goal is to provide quantitative information on subsurface S-wave velocity structures in response to a variety of social needs regarding geological and soil matters. Since S-wave velocity is a physical property directly related to site amplification and ground stiffness, it is expected to contribute to, for example, improving accuracy of seismic zoning for the mitigation of earthquake disasters. Currently, we are constructing a system for observation and analysis of microtremors to explore S-wave velocities within the depth range from several to tens of meters on the basis of 15-minute observations with a miniature seismic array having a radius of 0.6 m. The simplicity and objectivity of our system affords automization and quality control, with an expected capacity to acquire large amounts of microtremor data.

Journal

  • Synthesiology

    Synthesiology 9 (2), 86-96, 2016

    National Institute of Advanced Industrial Science and Technology

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