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タイトル: 北関東地域における爆破地震動の観測(下郷-桐生測線)
その他のタイトル: Seismic Refraction Experiment in the Northern Kanto District : Shimogo-Kiryu Profile
著者: 爆破地震動研究グループ
著者(別言語): Research Group for Explosion Seismology
発行日: 1996年3月15日
出版者: 東京大学地震研究所
掲載誌情報: 東京大学地震研究所彙報. 第71冊第1号, 1996.3.15, pp. 73-101
抄録: On November 11,1993, seismic refraction experiments were carried out in the northern part of the Kanto district. The 105-km profile was extended in the NNE-SSW directionfrom Shimogo, Fukushima Pref. to Kiryu, Gunma Pref. The line was geologically located above the volcanic front. Along this line, five explosive sources with charge size of 200-500kg were fired and the seismic waves generated were recorded at 195 temporary stations. High-quality records were obtained along the whole profile for all shots. The travel time curves of the first arrival suggest a rather gentle velocity structure in the upper crust despite the complicated geological structure. Several later arrivals, probably reflected waves from the upper crust, can be recognized on our record sections and the results of Nairiku seismic research group. Elaborate analysis of travel time curves and amplitudes of first and later arrivals will reveal the precise structure and tectonics of this volcanic district. An outline of this experiments is given briefly in this paper, and detailed results of the experiments will be published later in a separate paper.
URI: http://hdl.handle.net/2261/13149
ISSN: 00408972


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