Journal of Geography (Chigaku Zasshi)
Online ISSN : 1884-0884
Print ISSN : 0022-135X
ISSN-L : 0022-135X
Dense Instrument Array Observation by Public Works Research Institute
Yasushi SASAKIKeiichi TAMURAKoh AIZAWA
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1988 Volume 97 Issue 5 Pages 448-463

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Abstract

Dense instrument array observation systems by Public Works Research Institute are described. This kind of observation systems is recently introduced at several sites in earthquake-prone areas in the world, and is expected to give useful information to clarify characteristics of strong ground motion in detail.
Preliminary results of the analysis on the recorded data are also introduced in this paper, these are principal axis of the ground motion, phase velocity, amplification and the ground strain.

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