2016年1月
Periodic slow slip triggers megathrust zone earthquakes in northeastern Japan
SCIENCE
- ,
- ,
- ,
- ,
- 巻
- 351
- 号
- 6272
- 開始ページ
- 488
- 終了ページ
- 492
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1126/science.aad3108
- 出版者・発行元
- AMER ASSOC ADVANCEMENT SCIENCE
Both aseismic and seismic slip accommodate relative motion across partially coupled plate-boundary faults. In northeastern Japan, aseismic slip occurs in the form of decelerating afterslip after large interplate earthquakes and as relatively steady slip on uncoupled areas of the subduction thrust. Here we report on a previously unrecognized quasi-periodic slow-slip behavior that is widespread in the megathrust zone. The repeat intervals of the slow slip range from 1 to 6 years and often coincide with or precede clusters of large [magnitude (M) >= 5] earthquakes, including the 2011 M 9 Tohoku-oki earthquake. These results suggest that inherently periodic slow-slip events result in periodic stress perturbations and modulate the occurrence time of larger earthquakes. The periodicity in the slow-slip rate has the potential to help refine time-dependent earthquake forecasts.
- リンク情報
- ID情報
-
- DOI : 10.1126/science.aad3108
- ISSN : 0036-8075
- eISSN : 1095-9203
- ORCIDのPut Code : 22665943
- SCOPUS ID : 84956682252
- Web of Science ID : WOS:000368858200033