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Decadal Modulation of Repeating Slow Slip Event Activity in the Southwestern Ryukyu Arc Possibly Driven by Rifting Episodes at the Okinawa Trough

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この文献へのリンクには次のURLを使用してください:http://hdl.handle.net/2115/68539

タイトル: Decadal Modulation of Repeating Slow Slip Event Activity in the Southwestern Ryukyu Arc Possibly Driven by Rifting Episodes at the Okinawa Trough
著者: Tu, Yoko 著作を一覧する
Heki, Kosuke 著作を一覧する
キーワード: slow slip event
GNSS
slip accumulation rate
Ryukyu subduction zone
Okinawa Trough
back-arc spreading
発行日: 2017年 9月28日
出版者: American Geophysical Union
誌名: Geophysical research letters
巻: 44
号: 18
開始ページ: 9308
終了ページ: 9313
出版社 DOI: 10.1002/2017GL074455
抄録: We studied 38 slow slip events (SSEs) in 1997-2016 beneath the Iriomote Island, southwestern Ryukyu Arc, Japan, using continuous Global Navigation Satellite Systems data. These SSEs occur biannually on the same fault patch at a depth of similar to 30km on the subducting Philippine Sea Plate slab with average moment magnitudes (M-w) of similar to 6.6. Here we show that the slip accumulation rate (cumulative slip/lapse time) of these SSEs fluctuated over a decadal time scale. The rate increased twice around 2002 and 2013 concurrently with earthquake swarms in the Okinawa Trough. This suggests that episodic activations of the back-arc spreading at the Okinawa Trough caused extra southward movement of the block south of the trough and accelerated convergence at the Ryukyu Trench.
Rights: An edited version of this paper was published by AGU. Copyright 2017 American Geophysical Union. Tu, Y., & Heki, K. (2017). Decadal modulation of repeating slow slip event activity in the southwestern Ryukyu Arc possibly driven by rifting episodes at the Okinawa Trough. Geophysical Research Letters, 44, 9308–9313, DOI:10.1002/2017GL074455. To view the published open abstract, go to http://dx.doi.org and enter the DOI.
資料タイプ: article
URI: http://hdl.handle.net/2115/68539
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 日置 幸介

 

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