甘肅積石山 MS6.2 地震災(zāi)情特征及啟示
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中圖分類號：P315.9 文獻標(biāo)識碼：A 文章編號：2096-7780（2025）07-0383-12
doi：10.19987/j.dzkxjz.2024-091
AbstractOnDecember18，2023，a magnitude6.2earthquake struck JishishanCounty，located intheLinxia Hui Autonomous Prefecture of Gansu Province，resulting in significant casualties，building collpses，and various geological hazards.This study examines the disaster characteristics of the Jishishan earthquake by analyzing itsspatiotemporal context withinthehistorical seismicityof Gansu Province and comparing ittoother earthquakes of similar magnitude in theregion. Using datacolected from field investigations，the studyfurther explores the contributing factors tothe disastersfrom multiple perspectives，includinggeological，structural，and socio-environmental aspects.Theresults indicate that theJishishan earthquake affectedarea isseismicallyactive and currentlyundergoing a relatively highlevelof regional seismicity. Compared with past earthquakes of similar magnitudes，the Jishishan event resulted in significantly greater disaster losses.The primary factors contributing to the earthquake's high destructiveness include athrust-type seismogenic structure，a shallow focal depth，and siteamplification efects due to thick loess deposits.Additionally， widespread use of civil or brick-wood buildings with poor seismic resistance was a major cause of the severe structural damage and building collpses observed in the disaster Zone.The earthquake occurred in theearly hours of he night， when people were sleeping， which greatly shortened the emergency evacuation and response time，aggravating casualties. Harsh environmental conditions such as low temperatures，high-altitude plateaus，and step terrain-not onlyreduce the survival chances of individuals trapped underdebris but also significantly shorten thegolden window for rescue and increase operational dificultyof responders.The high proportion of vulnerable populations，including the elderly and children，compounded bytheir limited disaster awarenessand weak emergencyresponse capabilities，further exacerbated regionalcasualties.Basedonthese findings，this studyofers targetedrecommendations for improving earthquake disaster prevention， mitigation，and emergency response in the region.
KeywordsJishishan earthquake; disaster characteristics; earthquake prevention， disaster reduction and disaste1 relief; Gansu
0 引言
地震災(zāi)害是對人類生存威脅最大的自然災(zāi)害之一。（剩余25499字）