气候变化领域集成服务门户(CCPortal): The Impact of Large Erosional Events and Transient Normal Stress Changes on the Seismicity of Faults

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DOI	10.1029/2020GL087631
	The Impact of Large Erosional Events and Transient Normal Stress Changes on the Seismicity of Faults
	Jeandet Ribes L.; Cubas N.; Bhat H.S.; Steer P.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	The long-term erosion of steep landscapes is punctuated by dramatic erosional events that can remove significant amount of sediments within a timescale shorter than a seismic cycle. However, the role of such large erosional events on seismicity is poorly understood. We use QDYN, a quasi-dynamic numerical model of earthquake cycles to investigate the effect of a large erosional event on seismicity. The progressive evacuation of landslide sediments is modeled by a transient normal stress decrease. We show that erosional events with a shorter duration compared with the duration of a seismic cycle can significantly increase the seismicity rate, even for small stress changes. Moreover, large erosional events with a shorter period compared with the earthquake nucleation timescale can change earthquake size distribution by triggering more small events. Those results suggest that large erosional events can significantly affect seismicity, illustrating in turn the short-term impact of surface processes on tectonics. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Erosion; Earthquake cycles; Earthquake nucleation; Earthquake size distribution; Normal stress; Quasi-dynamics; Small stress; Surface process; Time-scales; Earthquakes; earthquake trigger; environmental stress; erosion; fault; nucleation; numerical model; seismicity; size distribution; timescale
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169467
作者单位	Institut des Sciences de la Terre Paris, ISTeP UMR 7193, Sorbonne Université, CNRS-INSU, Paris, France; Géosciences Rennes—UMR 6118, Univ Rennes, CNRS, Rennes, France; Laboratoire de Géologie, Ecole Normale Supérieure, CNRS-UMR 8538, PSL Research University, Paris, France
推荐引用方式 GB/T 7714	Jeandet Ribes L.,Cubas N.,Bhat H.S.,et al. The Impact of Large Erosional Events and Transient Normal Stress Changes on the Seismicity of Faults[J],2020,47(22).
APA	Jeandet Ribes L.,Cubas N.,Bhat H.S.,&Steer P..(2020).The Impact of Large Erosional Events and Transient Normal Stress Changes on the Seismicity of Faults.Geophysical Research Letters,47(22).
MLA	Jeandet Ribes L.,et al."The Impact of Large Erosional Events and Transient Normal Stress Changes on the Seismicity of Faults".Geophysical Research Letters 47.22(2020).