| Title: | Delamination structure imaged in the source area of the 1982 Urakawa-oki earthquake |
| Authors: | Murai, Yoshio Browse this author →KAKEN DB |
| Akiyama, Satoshi Browse this author |
| Katsumata, Kei Browse this author |
| Takanami, Tetsuo Browse this author |
| Yamashina, Tadashi Browse this author |
| Watanabe, Tomoki Browse this author |
| Cho, Ikuo Browse this author |
| Tanaka, Masayuki Browse this author |
| Kuwano, Asako Browse this author |
| Wada, Naoto Browse this author |
| Shimamura, Hideki Browse this author |
| Furuya, Itsuo Browse this author |
| Zhao, Dapeng Browse this author |
| Sanda, Ryohei Browse this author |
| Issue Date: | 14-May-2003 |
| Publisher: | American Geophysical Union |
| Journal Title: | Geophysical Research Letters |
| Volume: | 30 |
| Issue: | 9 |
| Start Page: | 1490 |
| Publisher DOI: | 10.1029/2002GL016459 |
| Abstract: | The Kuril arc collides with the northeast Japan arc in the southern part of Hokkaido, Japan. 3-D tomographic inversion of data from a dense network of sensitive ocean-bottom seismographs and land stations has allowed imaging of previously unseen details of the arc-arc collision structure. A low velocity body dips gently southwestward, at depths of 35 to 45 km, from east of the Hidaka Mountains to the source area of the 1982 Urakawa-oki destructive earthquake (Ms 6.8). The low velocity body is the lower half of the lower crust of the Kuril arc, which must have been delaminated by the collision. We believe that the continuing collision of the delaminated lower crust with the northeast Japan arc resulted as an episode of aseismic slow slip prior to the 1982 Urakawa-oki earthquake as well being the reason for the high seismic activity in this region. |
| Rights: | An edited version of this paper was published by AGU / Copyright 2003, American Geophysical Union, GEOPHYSICAL RESEARCH LETTERS |
| Relation: | http://www.agu.org/homepage.html |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/17236 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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