Introduction to the Earthquake Annihilation Lake: Formed due to the blockage of the Banjia River by the earthquake, the lake covers an area of ​​2.87 square kilometers and is narrow and elongated, nearly 5 kilometers long and 1 meter wide at its widest point. The average depth of the lake is 30 meters, with the deepest point reaching 52.7 meters, and the entire reservoir capacity reaches 70.2 million cubic meters.