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タイトル: | Stress relaxation arrested the mainshock rupture of the 2016 Central Tottori earthquake |
著者: | Iio, Yoshihisa https://orcid.org/0000-0003-0808-0757 (unconfirmed) Matsumoto, Satoshi Yamashita, Yusuke https://orcid.org/0000-0002-5347-5216 (unconfirmed) Sakai, Shin’ichi Tomisaka, Kazuhide Sawada, Masayo Iidaka, Takashi Iwasaki, Takaya Kamizono, Megumi Katao, Hiroshi https://orcid.org/0000-0002-2070-6284 (unconfirmed) Kato, Aitaro Kurashimo, Eiji Teguri, Yoshiko Tsuda, Hiroo Ueno, Takashi |
著者名の別形: | 飯尾, 能久 松本, 聡 山下, 裕亮 酒井, 慎一 冨阪, 和秀 澤田, 麻沙代 飯高, 隆 岩崎, 貴哉 神薗, めぐみ 片尾, 浩 加藤, 愛太郎 藏下, 英司 手操, 佳子 津田, 寛大 |
キーワード: | Geodynamics Tectonics |
発行日: | 2021 |
出版者: | Springer Nature |
誌名: | Communications Earth & Environment |
巻: | 2 |
論文番号: | 156 |
抄録: | After a large earthquake, many small earthquakes, called aftershocks, ensue. Additional large earthquakes typically do not occur, despite the fact that the large static stress near the edges of the fault is expected to trigger further large earthquakes at these locations. Here we analyse ~10, 000 highly accurate focal mechanism solutions of aftershocks of the 2016 Mw 6.2 Central Tottori earthquake in Japan. We determine the location of the horizontal edges of the mainshock fault relative to the aftershock hypocentres, with an accuracy of approximately 200 m. We find that aftershocks rarely occur near the horizontal edges and extensions of the fault. We propose that the mainshock rupture was arrested within areas characterised by substantial stress relaxation prior to the main earthquake. This stress relaxation along fault edges could explain why mainshocks are rarely followed by further large earthquakes. |
記述: | 地震の破壊はなぜ止まるのか? --2016年鳥取県中部地震の断層サイズを決めたもの--. 京都大学プレスリリース. 2021-08-12. |
著作権等: | © The Author(s) 2021 This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. |
URI: | http://hdl.handle.net/2433/264951 |
DOI(出版社版): | 10.1038/s43247-021-00231-6 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2021-08-12-1 |
出現コレクション: | 学術雑誌掲載論文等 |
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