气候变化领域集成服务门户(CCPortal): Geomorphology and Paleoseismology of the Weinan Fault, Shaanxi, Central China, and the Source of the 1556 Huaxian Earthquake

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DOI	10.1029/2019JB017848
	Geomorphology and Paleoseismology of the Weinan Fault, Shaanxi, Central China, and the Source of the 1556 Huaxian Earthquake
	Feng X.; Ma J.; Zhou Y.; England P.; Parsons B.; Rizza M.A.; Walker R.T.
发表日期	2020
ISSN	21699313
卷号	125 期号:12
英文摘要	The 1556 CE Huaxian earthquake resulted in an estimated 830,000 deaths and caused widespread devastation in the Weihe Basin, China. Seismic intensities from historical accounts yield, via magnitude-intensity relations, a commonly quoted magnitude of 8¼ to 8½. The maximum recorded shaking was confined to a zone close to the Huashan and Weinan faults, which exhibit fresh scarps up to 7–8 m high. Recent palaeoseismic studies have suggested, however, that the Weinan fault has not ruptured at the surface for several thousand years. Furthermore, the 90-km combined length of the Huashan and Weinan faults is short for an earthquake of magnitude 8¼ to 8½. We present a detailed analysis of the Weinan fault at one well-preserved site, combining field observations and age constraints from fluvial terraces displaced by faulting, analysis of a high-resolution digital elevation model (DEM), interpretation of the walls of a quarry that cuts through the fault zone, and from a profile of borehole cores across the fault. We find that the fault ruptured within the last ~900 years and is likely, along with the Huashan segment, to be the causative fault for the 1556 earthquake. The magnitude remains uncertain, with Mw ~ 7.5 being a plausible estimate given the fault length, and no more than Mw 8.0 if we use the maximum estimates of slip. These estimates are considerably smaller than magnitudes estimated from intensities, with importance in estimating the recurrence intervals between destructive earthquakes and hazard across central China. © 2020. The Authors.
英文关键词	China; historical earthquakes; intraplate earthquakes; recurrence interval; seismic hazard
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/187441
作者单位	Shaanxi Earthquake Agency, Xian, China; State Key Laboratory of Active Tectonics and Volcanoes, Institute of Geology, China Earthquake Administration, Beijing, China; Department of Earth Sciences, Oxford University, Oxford, United Kingdom; Guangdong Provincial Key Laboratory of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou, China; Aix-Marseille Université, CNRS, IRD, CEREGE UM34, Aix en Provence, France
推荐引用方式 GB/T 7714	Feng X.,Ma J.,Zhou Y.,et al. Geomorphology and Paleoseismology of the Weinan Fault, Shaanxi, Central China, and the Source of the 1556 Huaxian Earthquake[J],2020,125(12).
APA	Feng X..,Ma J..,Zhou Y..,England P..,Parsons B..,...&Walker R.T..(2020).Geomorphology and Paleoseismology of the Weinan Fault, Shaanxi, Central China, and the Source of the 1556 Huaxian Earthquake.Journal of Geophysical Research: Solid Earth,125(12).
MLA	Feng X.,et al."Geomorphology and Paleoseismology of the Weinan Fault, Shaanxi, Central China, and the Source of the 1556 Huaxian Earthquake".Journal of Geophysical Research: Solid Earth 125.12(2020).