It is well recognized that the in situ measurements of S- and P-wave velocities give us elastic constants of the subsoil layers, since we have ample data on the densities of the formations concerned. These constants, especially the rigidity of each formation, are inevitably necessary in elucidating the vibration characteristics of the ground in the principal portion of an earthquake. In view of the importance of such information in earthquake engineering, measurements of S-wave velocities in the strata near the surface drew the keen interest of seismologists and technologists engaged in the prevention of earthquake disasters. We have therefore made a series of such surveys in Tokyo Metropolis to develop a more efficient method of survey as well as to accumulate all the data necessary for the calculation of transfer function of the subsoil layers for S-waves (which constitute the principal motions in near earthquakes). The Metropolitan Government is now in urgent need of a map of intensity distribution in an imminent earthquake, for its hazard estimation throughout its jurisdiction.
雑誌名
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo
巻
47
号
4
ページ
819 - 829
発行年
1969-09-30
ISSN
00408972
書誌レコードID
AN00162258
フォーマット
application/pdf
日本十進分類法
453
出版者
東京大学地震研究所
出版者別名
Earthquake Research Institute, University of Tokyo
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36.東京都内各所におけるS波の測定結果 : 第4報
ji0474011.pdf
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