- 著者
- 岡村 行信 坂本 泉 滝野 義幸
- 出版者
- 産業技術総合研究所地質調査総合センター
- 雑誌
- 活断層・古地震研究報告 (ISSN:18839681)
- 巻号頁・発行日
- no.13, pp.187-232, 2013
1 0 0 0 OA 箱根火山芦ノ湖の湖底における箱根町断層地形
- 著者
- 平田 大二 山下 浩之 坂本 泉 小田原 啓 滝野 義幸 鬼頭 毅 藤巻 三樹雄 萬年 一剛 新井田 秀一 笠間 友博 齊藤 靖二
- 出版者
- 公益社団法人 東京地学協会
- 雑誌
- 地学雑誌 (ISSN:0022135X)
- 巻号頁・発行日
- vol.119, no.5, pp.911-916, 2010-10-25 (Released:2011-01-21)
- 参考文献数
- 12
The bottom topography of lake Ashi-no-ko, in the Hakone volcano caldera, was examined using the SeaBat8101 narrow multi-beam sonar system. The purpose of micro-topographical observations of the lake bottom is to understand the tectonic relations between the historical formation-process of the caldera and the strike-slip motion in the Tanna-Hirayama active fault system. At the southeastern part of the lake, west of the Dougashima, undulations at the bottom such as swells, hollows, and stairs extending in the northwest-southeast direction, were observed. These bottom-forms show a northern extension of the Hakonemachi active fault, running along the east side of lake Ashi-no-ko. They may correspond to one of the north spray faults of the Kita-Izu active fault system, which is the source of the A.D.1930 Kita-Izu earthquake, and to motions of the western margin of the Manazuru micro-plate, in relation to caldera formation as a strike-slip basin.