1. The Qishan earthquake in Shaanxi Province occurred in the second year of Zhou Youwang (780 BC). This is the earliest major earthquake recorded in the history books of China. During the earthquake, there were three Sichuan earthquakes in the Western Zhou Dynasty. In the year of Sanjiang, Qishan collapsed (Mandarin Zhou Yu). Sanchuan is the Jinghe River, Weihe River and Luohe River in Shaanxi Province. The estimated magnitude can reach more than 7.
2. The Beijun earthquake occurred in September of the second year of the Western Han Dynasty (BC 1 1.00), in He Sui and Chen Bing. According to historical records, the earthquake affected "more than 30 bad battlements from Jingshi to Beijun, with 415 deaths" (History of Five Elements). The capital is now Xi City, Shaanxi Province. The northern counties in Han Dynasty should include Gansu, Shaanxi, Shanxi, Hebei and other provinces.
How to prevent earthquakes?
1. Establish and improve the earthquake monitoring and early warning system: improve the accuracy and timeliness of earthquake early warning by strengthening the construction of earthquake monitoring network. At the same time, strengthen the analysis and processing ability of seismic data, and provide scientific basis for earthquake prevention.
2. Strengthening the seismic capacity of buildings: For buildings, strengthening the seismic design is the key to prevent earthquakes. In the process of architectural design, the influence of earthquake should be fully considered, and reasonable structural forms and seismic measures should be taken to improve the seismic capacity of buildings.
3. Formulate emergency plans: governments at all levels and relevant departments should formulate detailed earthquake emergency plans, clarify their respective responsibilities and tasks, strengthen the construction of emergency rescue teams, and improve their ability to cope with earthquake disasters.