Rapid Assessment of Coseismic Hazards Induced by Jishishan Ms6.2 Earthquake on December 18,2023 in Gansu Province,Northwest China
On December 18,2023,an Ms6.2 earthquake occurred in Jishishan County,Gansu Province.The earthquake triggered a mudflow disaster in Jintian Village,Zhong-chuan Township,Guanting Basin,causing serious damage and casualties.Comparative analysis of pre-and post-earthquake high-resolution satellite/aerial images shows that the Jishishan Ms6.2 earthquake did not trigger large-scale coseismic landslides and dense soil liquefaction,but dense large-size loess landslides and soil liquefaction pits developed before the earthquake maybe triggered by paleoearthquake event(s).The mudflow disaster in Jintian village was caused by the flow of clay soil with high water content in the source ar-ea under vibration conditions,which was possibly related to the human cultivation(winter irrigation from the Yellow River).
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