2016年7月31日广西苍梧5.4级地震灾害特征分析  

ANALYSIS ON DISASTER CHARACTERISTICS OF THE M_S5.4 CANGWU,GUANGXI EARTHQUAKE,JULY,31^(th),2016

作　　者：周军学 聂高众[1] 谭劲先 李莎 范熙伟[1] 毕熙荣 

机构地区：[1]中国地震局地质研究所,北京100029 [2]广西壮族自治区地震局,南宁530022 [3]广西大学,南宁530004

出　　处：《地震地质》2017年第4期780-792,共13页Seismology and Geology

基　　金：中国地震局地质研究所基本科研业务专项(IGCEA1522);国家自然科学基金(41601390);广西壮族自治区地震局科研合同制项目(2016006);"大中城市地震灾害情景构建"重点专项(2016QJGJ14)共同资助

摘　　要：2016年7月31日广西苍梧县发生5.4级地震,震源深度10km,位于广西、湖南、广东3省(区)交界,具有特殊的地理位置、地形地貌、人口分布、气候条件等。此次地震相比国内同等级地震,造成的灾害损失相对较轻,但其打破了华南少震弱震地区的平静,应引起足够的重视。经过现场实地考察和总结分析,得出苍梧地震7大灾情特征:发生于少震弱震地区;灾区人口密度低;灾区建筑类型单一,经济发展水平低;地震动持续时间短;余震少且震级低;地震未引发大型滑坡、泥石流等次生地质灾害;台风等气候灾害多发,易与地震灾害叠加。文中通过介绍此次地震的基本概况,初步分析了苍梧地震的灾害特征,总结了部分经验和启示,为华南少震弱震地区更好地应对中强地震,最大限度减轻人民生命财产损失,提出了具有针对性的建议和应对措施。On July 31^（th）,2016,a moderately strong earthquake of M_S5.4 hit the Cangwu County in Guangxi Zhuang Autonomous Region. The focal depth of this earthquake is about 10 kilometers. This earthquake occurred in the junction area of Guangxi Zhuang Autonomous Region,Hunan Province and Guangdong Province. Nanning,Guangzhou,Shenzhen and other cities felt this earthquake.The Cangwu County disaster area is unique in terms of geographical position,tectonic geology,landform,economic development situation,population distribution and climate condition,etc. Based on the investigation to the earthquake hit area,and the analysis of its special natural environment,social economical conditions and humanities,seven general disaster characteristics of the Cangwu M_S5.4 earthquake are summarized from the point of view of earthquake disaster emergency rescue and reconstruction. namely,the low population density in the disaster area,the single building structure type and the low-level economic development,the short duration of ground motion,the small number and low magnitude of aftershocks,no large landslide,debris flow and other secondary geological disasters caused by this earthquake,the area is prone to typhoon and other climate disasters which are likely to aggravate earthquake disaster,and the earthquake occurred in an area of weak seismicity in South China.This paper introduces the basic situation of the M_S5.4 Cangwu earthquake and analyzes the seven disaster characteristics of this earthquake. In order to better respond to moderate-strong earthquake in weak seismicity regions of South China,this paper summarizes some experience and revelations about the earthquake in the M_S5.4 Cangwu earthquake emergency response process,and puts forward some corresponding countermeasures of earthquake disaster reduction in weak seismicity regions in southern China.In the future work,we should pay more attention to pre-disaster prevention,and strengthen earthquake-monitoring capability. In order to reduce the casualties caused by collapse

关 键 词：苍梧5.4级地震 少震弱震地区 灾害特征分析 

分 类 号：P315.9[天文地球—地震学]