气候变化领域集成服务门户(CCPortal): Seismic hazard of multi-segment rupturing for the Anninghe–Zemuhe–Daliangshan fault region, southeastern Tibetan Plateau: constraints from geological and geodetic slip rates

CCPortal

DOI	10.1007/s11069-021-04643-7
	Seismic hazard of multi-segment rupturing for the Anninghe–Zemuhe–Daliangshan fault region, southeastern Tibetan Plateau: constraints from geological and geodetic slip rates
	Cheng J.; Xu X.; Yao Q.; Yang X.; Chen H.
发表日期	2021
ISSN	0921030X
起始页码	1501
结束页码	1525
卷号	107 期号:2
英文摘要	The Anninghe–Zemuhe–Daliangshan region is deformed by two parallel faults, i.e., the Anninghe–Zemuhe fault and the Daliangshan fault. A large seismic gap that characterizes the AZD region in the past 30 years has attracted significant research attentions to study the seismic hazard of these faults. However, it still remains a matter of debate whether the southern part of the Anninghe fault was ruptured with the Zemuhe fault in the 1850 M7.5 earthquake. The multi-segment rupture probabilities should be considered in the seismic hazard analysis. In this study, we divide the Anninghe fault, the Zemuhe fault and the Daliangshan fault into segments which are then used to build different multi-segment rupture combination models. First, we invert the fault slip rate in an elastic block model. Using both the geological and inverted geodetic slip rates as input constraints, we model the seismicity rates on the fault segments. Then, we compare the modeled seismicity rates with the historical earthquake catalog to test the validity of the models. The model, which does not consist of the multi-segment span the Anninghe fault and the Zemuhe fault, and the multi-segment combinations among the segments of the south Daliangshan fault and the north Xiaojiang fault, has the seismicity rates generally consistent with the fault slip rates and historical records. Finally, we use the compatible fault model to calculate the 475-year PGA values. Our modeled PGA values, from both the geological and geodetic slip rates, are averagely higher than those from the National Zonation Map. This methodology is more reasonable as it considers the fault slip rate and multi-segment rupture. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. part of Springer Nature.
关键词	Geodetic slip rate Geological slip rate Multi-segment Rupture Seismic hazard analysis The 1850 M7.5 earthquake The Anninghe–Zemuhe–Daliangshan region
英文关键词	earthquake catalogue; earthquake rupture; historical record; seismic hazard; seismicity; slip rate; Anninghe Fault Zone; China; Daliang Mountains; Qinghai-Xizang Plateau; Sichuan; Zemuhe Fault Zone
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206158
作者单位	Ministry of Emergency Management of China, National Institute of Natural Hazards, Beijing, 100085, China; Southern Yunnan Observatory for Cross-Block Dynamic Process, Yuxi, 652799, China; Institute of Earthquake Forecast, Earthquake Administration, Beijing, 100049, China; Université de Paris, Institut de Physique du Globe de Paris, CNRS, Paris, 75005, France; School of Insurance, Central University of Finance and Economics, Beijing, 102206, China
推荐引用方式 GB/T 7714	Cheng J.,Xu X.,Yao Q.,等. Seismic hazard of multi-segment rupturing for the Anninghe–Zemuhe–Daliangshan fault region, southeastern Tibetan Plateau: constraints from geological and geodetic slip rates[J],2021,107(2).
APA	Cheng J.,Xu X.,Yao Q.,Yang X.,&Chen H..(2021).Seismic hazard of multi-segment rupturing for the Anninghe–Zemuhe–Daliangshan fault region, southeastern Tibetan Plateau: constraints from geological and geodetic slip rates.Natural Hazards,107(2).
MLA	Cheng J.,et al."Seismic hazard of multi-segment rupturing for the Anninghe–Zemuhe–Daliangshan fault region, southeastern Tibetan Plateau: constraints from geological and geodetic slip rates".Natural Hazards 107.2(2021).