2023年甘肃积石山6.2级地震青海灾区地震地质灾害初步调查分析  

Preliminary Investigation and Analysis of Seismic Geological Hazards in Qinghai Disaster Area Induced by the 2023 M_(s)6.2 Jishishan Earthquake

作　　者：杨传成 李智敏 熊仁伟[3] 盖海龙 YANG Chuan-cheng;LI Zhi-min;XIONG Ren-wei;GAI Hai-long(Earthquake Risk Prevention Center of Shandong Province,Jinan 250014,China;Earthquake Administration of Qinghai Province,Xining 810001,China;Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,China)

机构地区：[1]山东省震灾风险防治中心,山东济南有250014 [2]青海省震灾风险防治中心,青海西宁810000 [3]中国地震局地震预测研究所,北京100036

出　　处：《地震》2024年第1期216-225,共10页Earthquake

基　　金：青海省基础研究计划项目(2022-ZJ-749)。

摘　　要：北京时间2023年12月18日23时59分,甘肃省积石山县(35.70°N, 102.79°E)发生6.2级地震,积石山县大河家镇为本次地震的宏观震中,地震烈度为Ⅷ度(8度)。通过2023年12月18日甘肃积石山MS6.2地震青海地区的现场初步调查发现,这次地震造成大量房屋倒塌,多处出现滑坡、地裂缝和喷砂冒水(液化)现象。由于震区浅表土质松软,地下含水较多,地震的破裂和构造作用造成浅表地体的流滑。本文简要介绍了本次地震的烈度分布、地震地质灾害类型及特点,分析讨论总结此次地震灾害的特征及影响。本研究可为地质灾害重点防范区范围划定、趋势预测和灾后重建提供科学参考,对今后抗震设防和防震减灾工作有启示作用。At 23:59 Beijing Time on December 18,2023,an M_(s)6.2 earthquake occurred in Jishishan County,Gansu Province(35.70°N,102.79°E).Dahexia Town in Jishishan County was the epicenter of this earthquake,with an intensity of Ⅷ(8).Following this event,a preliminary on-site investigation in Qinghai revealed extensive damage,including collapsed houses,landslides,ground fissures,and liquefaction phenomena.The soft sur-face soil and high groundwater content exacerbated surface displacement due to the earth-quake's rupture and structural effects.This paper outlines the earthquake's intensity dis-tribution and seismic geological disaster characteristics,analyzing and summarizing its impacts.This study offers scientific insights for delineating disaster prevention areas,pre-dicting trends,and guiding post-disaster reconstruction efforts,aiding future earthquake resilience and mitigation strategies.

关 键 词：2023年积石山6.2级地震 青海地区 地质灾害 流滑 

分 类 号：P315.7[天文地球—地震学]