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タイトル: The Fifth Explosion Seismic Observations carried out in the North-eastern Japan.
その他のタイトル: 東北日本に於ける第5回爆破地震動観測
著者: the Research Group for Explosion Seismology.
著者(別言語): 爆破地震動研究グループ
発行日: 1956年3月30日
出版者: 東京大学地震研究所
掲載誌情報: 東京大學地震研究所彙報. 第33冊第4号, 1956.3.30, pp. 699-707
抄録: In the present experiment, effort of observation was concentrated in a region to the south of the blast point and with ⊿ within 300km. From P waves, a layer of 6.05km./sec. should overlie a lower layer of 7.2 or 7.6km./sec. with a corresponding thickness of 22 or 25km. This result is sufficiently supported by the observation of reflected waves. From S waves, a layer of 3.46km./sec. should overlie a layer of 4.5 or 4.8km./sec. with a corresponding thickness of 32 or 36km. As stated before, discrepancies in the results of the past several experiments arise probably from the inadequate assumption that the crustal structure is uniformly horizontal. The accumulation of data made so far may be sufficient for deduction of a more complicated structure which must be nearer the real state. This deduction should be made with all the available data by taking the geological and gravitational evidences into consideration.
URI: http://hdl.handle.net/2261/11839
ISSN: 00408972


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