What is the largest earthquake magnitude in Chongqing history?

The biggest earthquake in Chongqing history was the Xiaonanhai earthquake in Qianjiang, which occurred in Renzi in the sixth year of Xianfeng in Qing Dynasty (65438+ 10 June, 856). According to historical records, the magnitude of the earthquake was about 8, and the epicenter was between Houba Township in Qianjiang, Hubei Province and Daluba Township in Xianfeng (now between Xiaonanhai Town in Qianjiang District and Daluba Town in Xianfeng).

Tongzhi four years "Xianfeng County Records" contains

"Xianfeng six years in May, the earthquake, the road dam collapse. From Meijiawan, Banqiao River to Shepanzhai for more than 30 miles, it has become a lake. Hundreds of villagers were killed, and Li was the most. "

Extended data:

During an earthquake, the most basic phenomenon is the continuous vibration of the ground, and its main feature is obvious shaking.

People in the earthquake zone sometimes feel jumping up and down before they feel a big earthquake. Because seismic waves travel from underground to the ground, longitudinal waves arrive first.

Then, large horizontal shaking is the main cause of earthquake disaster. 1960 during the Chile earthquake, the biggest shaking lasted for 3 minutes. The first disaster caused by the earthquake was the destruction of houses and buildings. For example, in the 1976 Tangshan earthquake in China, 70%~80% of buildings collapsed, causing heavy casualties.

References:

Notes on Qianjiang County Records —— Xie Qianjiang District Government Network