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DOI	10.1016/j.tecto.2021.228719
	Enhancement of interplate coupling in adjacent segments after recent megathrust earthquakes
	Yuzariyadi M.; Heki K.
发表日期	2021
ISSN	00401951
卷号	801
英文摘要	Landward increase of surface velocity has been found for segments adjacent along-strike to megathrust faults after the 2003 Tokachi-oki and the 2011 Tohoku-oki earthquakes, NE Japan. A similar increase of landward velocities was reported for the segments to the north of the rupture of the 2010 Maule earthquake, Chile. We utilize available GNSS data to find such changes for six megathrust earthquakes in four subduction zones, including NE Japan, central and northern Chile, Sumatra, and Mexico to investigate their common features. Our study showed that such increase, ranging from a few mm/yr to ~1 cm/yr, appeared in adjacent segments following the 2014 Iquique (Chile), the 2007 Bengkulu (Sumatra), and the 2012 Oaxaca (Mexico) earthquakes in addition to the three cases. The region of the increased landward movements extends with spatial decay and reach the distance comparable to the along-strike fault length. On the other hand, the temporal decay of the increased velocity is not clear at present. The degree of increase seems to depend on the earthquake magnitude, and possibly scales with the average fault slip in the earthquake. This is consistent with the simple two-dimensional model proposed earlier to attribute the phenomenon to the enhanced coupling caused by accelerated subduction. However, these data are not strong enough to rule out other possibilities. © 2021 The Authors
关键词	Acceleration Enhancement of Interplate Coupling GNSS Megathrust earthquakes Seismic cycle Subduction
英文关键词	Fault slips; 2011 Tohoku-Oki earthquakes; Common features; Earthquake magnitudes; Interplate coupling; Megathrust earthquakes; Subduction zones; Surface velocity; Two dimensional model; Earthquakes; acceleration; earthquake event; earthquake rupture; GNSS; plate tectonics; seismicity; subduction; thrust fault; Chile; Japan
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/208109
作者单位	Dept. Natural History Sci, Hokkaido University, N10 W8, Kita-ku, Sapporo, Japan
推荐引用方式 GB/T 7714	Yuzariyadi M.,Heki K.. Enhancement of interplate coupling in adjacent segments after recent megathrust earthquakes[J],2021,801.
APA	Yuzariyadi M.,&Heki K..(2021).Enhancement of interplate coupling in adjacent segments after recent megathrust earthquakes.Tectonophysics,801.
MLA	Yuzariyadi M.,et al."Enhancement of interplate coupling in adjacent segments after recent megathrust earthquakes".Tectonophysics 801(2021).