著者
山中 浩明 瀬尾 和大 佐間野 隆憲 翠川 三郎
出版者
公益社団法人 日本地震学会
雑誌
地震 第2輯 (ISSN:00371114)
巻号頁・発行日
vol.39, no.4, pp.607-620, 1986-12-25 (Released:2010-03-11)
参考文献数
21

The seismic refraction prospecting was carried out in the southwestern part of the Tokyo Metropolitan area, to clarify the deep underground structure down to uppermost layer of the Earth's crust. The explosions were denoted at Nagatsuta, Kurokawa, Okazu and Yumenoshima. The explosion at Nagatsuta was planned to make clear the existence of vertical discontinuity of the basement between Nagatsuta and Yumenoshima, which has been suggested from the observation of Yumenoshima explosion. The underground structure was revealed by the travel time analysis. The main features of the underground structure are as follows:1) The underground structure consists of 4 layers. The P wave velocities of these layers are 1.8 to 2.0, 2.9, 4.8 and 5.5km/s, respectively.2) The thickness of the third leyer is several kilometers in this area, however this layer doesn't exist in the central part of the Kanto plain.3) The first layer is thinner than the second one in contrast with the underground structure of Yumenoshima situated on the center of the Kanto plain.4) The vertical discontinuity of the basement was not confirmed from Nagatsuta explosion, because the refracted wave from the basement was not observed as an initial motion at the expected stations.

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人工地震ってほんとにあるのね https://t.co/vRAuPDCNlW
さらに人工地震実験を行っている東京工大の論文の公開日も2010年3月11日。その翌年2011年3月11日には東北大震災。3.11が3回も出てくるのは偶然?J-STAGE Articles - 人工地震による首都圏南西部の地下深部探査 (2) https://t.co/LhHQUKw42c
@JYr7o @genesismarimo @nhk_news それは本筋とは関係ないですよね? まぁざっくり説明しますと神奈川県、東京都、東工大が首都圏南西部 の地下深部探査の為に行ったんです これがその研究に関する論文です↓ https://t.co/4ASQWSPIMP https://t.co/T9KXHIZhDn

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