Ground-motion characteristics estimated from spectral ratio between horizontal and vertical components of microtremor

Katsuaki Konno, Tatsuo Ohmachi

研究成果: Article査読

986 被引用数 (Scopus)

抄録

The spectral ratio between horizontal and vertical components (H/V ratio) of microtremors measured at the ground surface has been used to estimate fundamental periods and amplification factors of a site, although this technique lacks theoretical background. The aim of this article is to formulate the H/V technique in terms of the characteristics of Rayleigh and Love waves, and to contribute to improve the technique. The improvement includes use of not only peaks but also troughs in the H/V ratio for reliable estimation of the period and use of a newly proposed smoothing function for better estimation of the amplification factor. The formulation leads to a simple formula for the amplification factor expressed with the H/V ratio. With microtremor data measured at 546 junior high schools in 23 wards of Tokyo, the improved technique is applied to mapping site periods and amplification factors in the area.

本文言語English
ページ(範囲)228-241
ページ数14
ジャーナルBulletin of the Seismological Society of America
88
1
出版ステータスPublished - 1998 2

ASJC Scopus subject areas

  • 地球物理学
  • 地球化学および岩石学

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