Historical Records of Wenchuan Earthquake Ancient people in China began to record earthquakes very early. "Bamboo Chronicle" wrote: "The Taishan earthquake occurred in the seventh year of Xia Emperor." This is the earliest earthquake record in the world, more than 3800 years ago. In 780 BC (the second year of Zhou Youwang), China began to describe earthquakes in detail. Earthquakes are recorded in the ancient books of the pre-Qin period, such as Chunqiu, Guoyu and Zuozhuan, and many records of ancient earthquakes have been preserved. Since the Han Dynasty, earthquakes have been recorded as disasters in the historical "five elements" of each dynasty. After the Song and Yuan Dynasties, local chronicles developed, and earthquakes were recorded as disasters, which greatly increased the historical materials of earthquakes. In addition to official history and local chronicles, many privately written notes, miscellaneous notes, novels and poems also contain records about earthquakes, often with vivid descriptions. In addition, there are also records of historical earthquakes in the inscriptions. The author has a rough look, and the historical record of the earthquake disaster in Wenchuan County, Sichuan Province is roughly as follows: In December of the fourth year of Xiaozong Avenue in the Southern Song Dynasty, an earthquake of magnitude 4.6 occurred in Beichuan, with an intensity of 6 degrees. According to historical records: "The tile houses in Shiquan County (now Beichuan County) have fallen down. On the third day of the earthquake, the sound was like thunder. " "A Record of Emperor Xiaozong of the Ming Dynasty" has a heart. In the first month of Hongzhi's third year, "Wenchuan County, Sichuan earthquake, thunder rumbled." In October of the ninth year of Hongzhi's reign, Bingzi said, "There are earthquakes in Wenchuan County and Weizhou, Sichuan." In February of the fourteenth year of Hongzhi's reign, Xin Mao said, "The eighth day earthquake in Wenchuan County, Sichuan Province, was thunderous again." In July of the fourteenth year of Hongzhi, Ren Chen said, "The earthquake in Wenchuan County, Sichuan Province was thunderous." "A Record of Emperor Xiaozong of the Ming Dynasty" Bing Chen in the fourteenth year of Hongzhi: "A small river in Sichuan is stacked with streams, and thousands of households are protected. The Maosui and Wenchuan earthquakes are like thunder." In the seventeenth year of Hongzhi in Records of Xiao Zong of Ming Dynasty, Bingzi said, "The earthquake in Weizhou and Wenchuan County of Sichuan Province is like thunder." Zheng Deyuan applied for the World Heritage in October 2000: "Earthquakes in Maozhou and Wenchuan County." In Ming Dynasty, Wuzong recorded: "Earthquakes in Maozhou and Wenchuan counties of Sichuan." Ming Shenzong Record in July of the thirty-fifth year of Wanli: "There were several earthquakes in Songpan, Maozhou and Wenchuan." On March 8th, Qing Shunzhi 14, an earthquake with magnitude of 6 occurred in Wenchuan, with intensity of 6 degrees. According to relevant books, the walls of houses are inclined. Landslides and rocks broke and rivers boiled. Crushed countless men and women. From March 3, the earthquake can be heard day and night until April 9. On the 25th day of the first month of the 13th year of Qing Qianlong, an earthquake with magnitude of 5.5 occurred in Wenchuan and guanxian, with intensity of 6 degrees. According to relevant books, many bridges and roads in Wenchuan County were damaged. 1On August 25th, 933, an earthquake of magnitude 7.5 occurred in Diexi Town, 60km north of Maoxian County, Sichuan Province, with the epicenter intensity of 10 degree and the focal depth of 6. 1km. According to historical records, when the earthquake occurred, the ground was yellow and foggy, and there were no battlements; The central part of the city almost plummeted within a few minutes of the violent earthquake. The descending distance of a single stepped earthquake reached 500 to 600 meters, and Diexi Town no longer existed. On August 1976, 16, an earthquake of magnitude 7.2 occurred between Songpan and Pingwu, Sichuan. The earthquake was a swarm type, with a magnitude of 6.7 on the 22nd and a magnitude of 7.2 on the 23rd after the main earthquake. The earthquake felt a wide range, starting from Gao Tai, Gansu Province in the west, reaching Kunming in the south, Hohhot in the north and Changsha in the east, with a maximum radius of 1 150km. After the earthquake, heavy rain caused landslides, falling rocks and mudslides. , causing serious damage to farmland, roads, river beds, etc. , communication is interrupted. The earthquake happened in a sparsely populated mountainous area. In addition, there were predictions before the earthquake and evacuation measures were taken. So there were only more than 800 casualties, including more than 600 minor injuries. Source: Old.