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.
雑誌名
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo
巻
71
号
1
ページ
73 - 101
発行年
1996-03-15
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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北関東地域における爆破地震動の観測(下郷-桐生測線)
ji0711003.pdf
(2.48MB)
