The Seismo-Geological Hazards and Seismogenic Structure of the 2013 Deqing-Derong 5.9 Earthquake
Yang Jie
Zeng Zuoxun
Li Maohua
Fang Yanguo
Tan Zhaoshuang
Wu Shize
Gong Cheng
Abstract：On August 28st and 31st,2013,two earthquakes with magnitude of 5.1 and 5.9 occurred on the boundary between Deqing County,Yunnan Province,and Derong County,Sichuan Province.In order to evaluate the damage of the earthquake, we investigated on lots of seismo-geological hazards induced by the earthquakes and conducted the field investigation of geolog-ical structural section about the fractures near the epicenter.Those two earthquakes successively occurring at the adjacent posi-tion led to the intensity of this earthquake higher than that of the same magnitude.The maximum intensity of the 5.9 earth-quake is Ⅷ degree and the perceptible area is relatively large.The macroseismic epicenter is about 5.1 km from the 5.1 micro-seismic epicenter is roughly located at the middle of the two microseismic epicenter (28.20°N,99.36°E).The isoseismic line is shaped as an anomalous ellipse and the orientation of its long axis is NW-SE orientation along the Deqin-Zhongdian fault.Ac-cording to the field investigation of geological structural section about the fractures near the epicenter,the focal mechanism so-lution data and the special distribution characteristics of the aftershocks,we preliminary infer that the seismogenic structure is Deqin-Zhongdian fault and the Deqing-Derong 5.9 earthquake is a normal fault type earthquake characterized by strike-slip.
Keywords：Deqing-Derong earthquakeseismo-geological hazardsDeqin-Zhongdian faultseismogenic structureearthquake
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：9( 1701-1709 )