气候变化领域集成服务门户(CCPortal): Overlapping regions of coseismic and transient slow slip on the Hawaiian décollement

CCPortal

DOI	10.1016/j.epsl.2020.116353
	Overlapping regions of coseismic and transient slow slip on the Hawaiian décollement
	Lin J.-T.; Aslam K.S.; Thomas A.M.; Melgar D.
发表日期	2020
ISSN	0012821X
卷号	544
英文摘要	Earthquakes and slow slip are different faulting processes that release accumulated stress on different time scales. Despite nearly two decades of study, it is still unclear whether the same section of fault is capable of hosting both slow, aseismic and fast, seismic slip. Here, we jointly invert GPS, strong motion records, and empirically corrected tsunami waveforms for the 2018 M7.1 Hawai'i earthquake. Our inversion results suggest the earthquake had a slow rupture speed of 1.2 km/s with a maximum slip of ∼3 m South-East of the hypocenter extending to the South-West through an area known to regularly host slow slip events. After exploring how the choice of fault geometry and regularization parameters affect the slip distributions of the earthquake and slow slip events we find strong evidence of overlap between the two. Additionally, we perform numerical modeling to simulate fast and slow slip behavior. Due to the homogeneity of the Hawaiian décollement differences in effective stress are likely an important factor that causes the diversity of slip. We find that an earthquake can completely penetrate into the slow slip zone provided the effective stress differences between fast and slow slip zones is large enough to facilitate this. Our results reinforce the idea that an individual section of fault is capable of hosting a variety of distinct slip behaviors. This is important for estimating earthquake rupture extent and for better ground motion and tsunami hazard assessment. © 2020 Elsevier B.V.
关键词	2018 Mw7.1 Hawaii earthquake coseismic SSE overlap earthquake cycle modeling fault mechanics joint inversion slow slip event
英文关键词	Earthquake effects; Tsunamis; Accumulated stress; Different time scale; Earthquake rupture; Individual sections; Inversion results; Overlapping regions; Regularization parameters; Strong motion records; Fault slips; coseismic process; decollement; earthquake event; earthquake magnitude; earthquake mechanism; fault slip; faulting; hazard assessment; slip rate; tectonic setting; tsunami; Hawaii [United States]; United States
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202742
作者单位	Department of Earth Sciences, University of Oregon, 1272 University of Oregon, Eugene, OR 97403, United States
推荐引用方式 GB/T 7714	Lin J.-T.,Aslam K.S.,Thomas A.M.,et al. Overlapping regions of coseismic and transient slow slip on the Hawaiian décollement[J],2020,544.
APA	Lin J.-T.,Aslam K.S.,Thomas A.M.,&Melgar D..(2020).Overlapping regions of coseismic and transient slow slip on the Hawaiian décollement.Earth and Planetary Science Letters,544.
MLA	Lin J.-T.,et al."Overlapping regions of coseismic and transient slow slip on the Hawaiian décollement".Earth and Planetary Science Letters 544(2020).