Power law relations in earthquakes from microscopic to macroscopic scales

doi:10.1038/s41598-019-46864-8

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Power law relations in earthquakes from microscopic to macroscopic scales
	Meng, Fanzhen ; Wong, Louis Ngai Yuen ; Zhou, Hui
刊名	SCIENTIFIC REPORTS
	2019
卷号	9 期号:-页码:-
ISSN号	2045-2322
DOI	10.1038/s41598-019-46864-8
英文摘要	Understanding the physics of earthquakes is a crucial step towards improving the prediction accuracy of earthquakes. Scale invariance or fractal features are often reported in earthquakes, such as the size distribution of earthquakes, the spatial distribution of hypocenters, and the frequency of aftershocks. Here we assess whether other key parameters and quantities involved in earthquakes also conform to the power law. By analyzing a large amount of data collected from the laboratory experiments and field monitoring of earthquakes, we find that the crack density on the two sides of small scale fracture or large scale fault decreases with increasing distance following the power law, and the crack number-crack length distribution is also scale invariant like natural faults. Besides, the earthquake b-value is found to decrease with increasing stress in a power law in the brittle regime of the Earth's crust. The friction coefficient for dry fault and gouges or for partially saturated gouges decreases with the increasing effective normal stress in a power law. The stress dependency of b-value and friction coefficient is dictated by different mechanisms. Our findings will advance the understanding of earthquake physics, and will enable us to better model, predict and conduct hazard assessment of earthquakes.
WOS研究方向	Science & Technology - Other Topics
语种	英语
WOS记录号	WOS:000476874600003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/14943]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.Univ Hong Kong, Dept Earth Sci, Pokfulam, Hong Kong, Peoples R China; 2.Qingdao Univ Technol, Coll Sci, Qingdao 266033, Shandong, Peoples R China; 3.HKU Shenzhen Inst Res & Innovat HKU SIRI, Shenzhen 518057, Guangdong, Peoples R China; 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Meng, Fanzhen,Wong, Louis Ngai Yuen,Zhou, Hui. Power law relations in earthquakes from microscopic to macroscopic scales[J]. SCIENTIFIC REPORTS,2019,9(-):-.
APA	Meng, Fanzhen,Wong, Louis Ngai Yuen,&Zhou, Hui.(2019).Power law relations in earthquakes from microscopic to macroscopic scales.SCIENTIFIC REPORTS,9(-),-.
MLA	Meng, Fanzhen,et al."Power law relations in earthquakes from microscopic to macroscopic scales".SCIENTIFIC REPORTS 9.-(2019):-.