西夏·青史淡淡千百年——漫步地震五千年(10)  

Western Xia:Mysterious history

作　　者：冯锐[1] Feng Rui(China Earthquake Networks Center,Beijing 100045,China)

机构地区：[1]中国地震台网中心,北京100045

出　　处：《地震科学进展》2024年第8期543-558,共16页Progress in Earthquake Sciences

摘　　要：西夏是一个生机蓬勃而神秘的王朝,它的兴亡都伴有地震的发生,而甘肃—宁夏地区恰是地震高发区,值得关注这里的地震活动。对于存疑的996年地震事件,从小震密集、史料记载、地质探槽、地震强度上做了初步探讨,推测了这次地震位置和大小。介绍了1739年平罗地震的水患教训。注意到1920年海原8.5级地震的新研究中,发现了许多有价值的新信息,揭示了全球地震活动的大背景。甘肃—宁夏三角区的力学关系是三体问题,不可忽视旋转运动;对于发震条件,除断层带外,还要重视深部物性的结构差异。Western Xia is a vibrant and mysterious dynasty whose rise and fall has been accompanied by seismic activity.Because the Gansu-Ningxia region happens to be a high seismicity area,and I would like to take this opportunity to talk about the seismic activity here.For the doubts about the 996 AD earthquake event,a preliminary discussion was made based on the intensity of small earthquakes,historical records,geological trenching,and the intensity of earthquakes.The location and magnitude of this earthquake are tentatively estimated.Additionally,the lessons learned from the flooding caused by the 1739 Pingluo earthquake are discussed.Recent research on the 1920 Haiyuan earthquake with magnitude 8.5 has revealed valuable new information regarding its occurrence background within the context of global activity.The emergence of Gansu-Ningxia triangle area is the result of deep material transport,where the mechanical relationship is a three-body problem.Analyzing its mode of movement requires consideration of rotation.When assessing seismic conditions,it is crucial to emphasize not only fault zones but also structural differences in deep physical properties.

关 键 词：西夏地震活动 996年地震 地震水患 海原地震 甘宁三角区 

分 类 号：P315[天文地球—地震学]