Seismic risk assessment of Longling-Lancang fault zone,southwestern Yunnan
Shao Yanxiu
Yuan Daoyang
Liang Mingjian
Abstract：Longling-Lancang fault zone in southwestern Yunnan is an area with strong seismicity.Multi strong earthquakes with MS ≥ 7.0 hit the area and nearly ruptured the whole fault zone during last 100 years.This paper summa-rized characteristics of recent tectonic activities and calculated b value of the studied area first of all,and then combined with the distribution of historical strong earthquakes and modern small ones,the fault activity since Late Quater-nary and elapse time to analyze the potential seismic risk in the future syntheti-cally.Finally,based on the seismic gap theory,the seismic gaps in the fault zone are identified.The results show that the Longling,Yongde,Cangyuan, Lancang along the fault zone and middle-east segment of Menglian fault have a potential of moderate-strong earthquake occurrence in the future ten years.
Keywords：Longling-Lancang fault zoneb valueseismic gapseismic risk
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：13( 1011-1023 )