Earthquakes are one of the main causes of geological disasters in mountainous areas.Due to the comprehensive influence of seismic structures,rock mass strength,and geomorphic morphology,secondary geological disasters induced by earthquakes usually have significant distribution patterns and development characteristics.Revealing this pattern is extremely important for earthquake relief and risk assessment.On December 18,2023,at 23:59,an Ms 6.2 magnitude earthquake occurred in Jishishan County,Gansu Province,causing serious casualties and property damage in both Gansu and Qinghai Provinces.This earthquake has intensified some registered geological hazards and triggered a large number of new geological hazards,mainly including collapse,landslides,and mudslides.After the earth-quake,the team obtained a dataset of secondary geological hazards caused by the earthquake through rapid remote sensing interpretation and on-site investigation.The results showed that the earthquake caused more new collapse disasters than landslides,and the number of induced landslides was relatively small,with only a few exacerbating mudslides.The spatial characteristics are significantly controlled by the upper and lower wall effects of thrust structures and the weak loess geological environment.The geo-morphic conditions,especially slope,aspect,and relative height difference,significantly affect the spa-tial distribution of coseismic disasters.
维普
万方数据
