气候变化领域集成服务门户(CCPortal): Synchronization of Earthquake Cycles of Adjacent Segments on Oceanic Transform Faults Revealed by Numerical Simulation in the Framework of Rate-and-State Friction

CCPortal

DOI	10.1029/2020JB020231
	Synchronization of Earthquake Cycles of Adjacent Segments on Oceanic Transform Faults Revealed by Numerical Simulation in the Framework of Rate-and-State Friction
	Wei M.; Shi P.
发表日期	2021
ISSN	21699313
卷号	126 期号:1
英文摘要	Synchronization behavior of large earthquakes (rupture of nearby faults close in time for many cycles) has been reported in many fault systems. The general idea is that the faults in the system have similar repeating intervals and are positively coupled through stress interaction. However, many details of such synchronization remain unknown. Here, we built a numerical model in the framework of rate-and-state friction to simulate earthquake cycles on the west Gofar fault, East Pacific Rise. Our model consists of two seismic patches separated by a barrier patch, which are constrained by seismic observations. We varied the parameters in the barrier to understand its role on earthquake synchronization. First, we found that when the barrier is relatively weak, synchronization can be achieved by afterslip or post-seismic creep in the barrier patch. Second, static stress transfer can lead to synchronization, opposite to the suggestion by Scholz (2010, https://doi.org/10.1785/0120090309), which was based on results from a spring-slider model using rate-and-state friction. Third, the width of the barrier is more important than its strength. When the barrier is narrow enough (no more than half the width of the seismic patch in our model), the system can achieve synchronization even with a very strong barrier. Fourth, for certain simulations, the interaction between the two seismic patches promotes partial rupture in the seismic patches and leads to complex behavior: the system switches from synchronized to unsynchronized over 10–20 cycles. © 2020. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187410
作者单位	Graduate School of Oceanography, University of Rhode Island, Narragansett, RI, United States
推荐引用方式 GB/T 7714	Wei M.,Shi P.. Synchronization of Earthquake Cycles of Adjacent Segments on Oceanic Transform Faults Revealed by Numerical Simulation in the Framework of Rate-and-State Friction[J],2021,126(1).
APA	Wei M.,&Shi P..(2021).Synchronization of Earthquake Cycles of Adjacent Segments on Oceanic Transform Faults Revealed by Numerical Simulation in the Framework of Rate-and-State Friction.Journal of Geophysical Research: Solid Earth,126(1).
MLA	Wei M.,et al."Synchronization of Earthquake Cycles of Adjacent Segments on Oceanic Transform Faults Revealed by Numerical Simulation in the Framework of Rate-and-State Friction".Journal of Geophysical Research: Solid Earth 126.1(2021).