The destructive power of Hongdong earthquake

The losses and casualties caused by this earthquake are extremely heavy. In Huoxian, Zhao Cheng and Hongdong areas, almost all the houses with a length of 44 kilometers from north to south and a width of 18 kilometers from east to west collapsed, and in no one lives. A large-scale landslide occurred in Kuaibao, Zhaocheng County, ranging from Kuaibao Bridge and Hanjiazhuang in the northeast to Yingtian and Beiqibao in the southwest. The length of the ground slide is about1.600m, and the width is1.400m.. The villages on the sliding body moved for several kilometers with the sliding body, destroying many village castles, canals and roads. Debris flow and bank collapse also occurred near the landslide and wharf village to the south. The disaster swept Huoxian, Lingshi, Jiexiu, Xiaoyi, Pingyao, Fenyang, Qixian and Xugou in the north of Zhao Cheng, and Linfen, Fushan, Xiangfen and Quwo in the south. The houses of officials and civilians have disappeared, and there are ground fissures and urban depressions everywhere. Its periphery reaches Xinxian and Dingxiang in the north, Qinyang in Henan in the south, Changzhi and Zuo Quan in the east, and Daning and Chaoyi in Shaanxi in the west, all of which are damaged to varying degrees. There are very few buildings in the whole earthquake zone, even large ancient buildings such as temples, temples, yamen and Confucianism with thick walls, thick columns and many beams, which have good seismic performance, have been destroyed in more than 1400 places. However, Wanrong, Jishan and Linyi counties on the Emei platform between Linfen Basin and Yuncheng Basin were slightly damaged, especially the Shi Yu Temple in Fengbo, which was built on the top of the Emei platform, was intact, which was inseparable from the good seismic performance of the building itself and the good foundation properties of the platform. The platform structure is undeveloped, covered with Quaternary loess from tens of meters to more than 100 meters, and the groundwater level is less than 100 meters deep. During the earthquake, there were no phenomena such as sand liquefaction and foundation damage, which protected the building from other factors besides vibration, so the disaster was relatively small.