Source rupture processes of the 2016 Kumamoto, Japan, earthquakes estimated from strong-motion waveforms

• 資料種別: 記事
• タイトル: Source rupture processes of the 2016 Kumamoto, Japan, earthquakes estimated from strong-motion waveforms
• 著者・編者: Hisahiko Kubo; Wataru Suzuki; Shin Aoi
• 出版事項: 日本 : Springer science+business media
• 出版年月日等: 2016-10-03
• 出版年（W3CDTF）: 2016-10-03
• タイトル（掲載誌）: EPS : Earth, Planets and Space
• 巻号年月日等（掲載誌）: 68(161)
• 掲載巻: 68(161)
• ISSN（掲載誌）: 1880-5981
• ISSN-L（掲載誌）: 1343-8832
• 本文の言語コード: eng
• DOI: 10.1186/s40623-016-0536-8; https://doi.org/10.1186/s40623-016-0536-8
• 国立国会図書館永続的識別子: info:ndljp/pid/10267432; https://dl.ndl.go.jp/pid/10267432
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• 収集根拠: オンライン資料収集制度
• 受理日（W3CDTF）: 2017-01-25T12:55:04+09:00
• 保存日（W3CDTF）: 2017-01-13
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• 要約等: The detailed source rupture process of the M 7.3 event (April 16, 2016, 01:25, JST) of the 2016 Kumamoto, Japan, earthquakes was derived from strong-motion waveforms using multiple-time-window linear waveform inversion. Based on the observations of surface ruptures, the spatial distribution of aftershocks, and the geodetic data, a realistic curved fault model was developed for source-process analysis of this event. The seismic moment and maximum slip were estimated as 5.5 × 1019 Nm (M w 7.1) and 3.8 m, respectively. The source model of the M 7.3 event had two significant ruptures. One rupture propagated toward the northeastern shallow region at 4 s after rupture initiation and continued with large slips to approximately 16 s. This rupture caused a large slip region 10–30 km northeast of the hypocenter that reached the caldera of Mt. Aso. Another rupture propagated toward the surface from the hypocenter at 2–6 s and then propagated toward the northeast along the near surface at 6–10 s. A comparison with the result of using a single fault plane model demonstrated that the use of the curved fault model led to improved waveform fit at the stations south of the fault. The source process of the M 6.5 event (April 14, 2016, 21:26, JST) was also estimated. In the source model obtained for the M 6.5 event, the seismic moment was 1.7 × 1018 Nm (M w 6.1), and the rupture with large slips propagated from the hypocenter to the surface along the north-northeast direction at 1–6 s. The results in this study are consistent with observations of the surface ruptures.
• DOI: 10.1186/s40623-016-0536-8; https://doi.org/10.1186/s40623-016-0536-8
• オンライン閲覧公開範囲: インターネット公開
• 著作権情報: © 2016 The Author(s). This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.
• 関連情報（URI）: http://hdl.handle.net/2433/218864; http://id.ndl.go.jp/digimeta/10267432; https://dl.ndl.go.jp/pid/10267432; http://link.springer.com/content/pdf/10.1186/s40623-016-0536-8.pdf; http://link.springer.com/article/10.1186/s40623-016-0536-8/fulltext.html
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