The Ya 'an earthquake occurred on 20 13. 20 13 On April 20th, an earthquake of magnitude 7.0 occurred in Ya 'an, Sichuan. The earthquake * * caused 196 deaths and130,000 injuries. More than 690,000 houses collapsed or were seriously damaged, and more than 2.46 million people were affected. Baishu village, less than 20 kilometers from the epicenter, also suffered serious losses.

Cause of Ya 'an earthquake

Geographically, Sichuan province, especially the western Sichuan region, is located in the Longmenshan seismic belt in Sichuan, with many earthquakes and high intensity. Longmenshan earthquake fault zone and Longmenshan are located at the eastern boundary of Bayan Kara block, with Bayan Kara in the west and Sichuan Basin in the southeast.

Tectonic earthquake is an earthquake caused by the displacement and displacement of rock cracks and the great change of geological structure, so it is called tectonic earthquake, also known as fault earthquake. Man-made earthquakes are earthquakes caused by human activities, such as the vibration of underground nuclear explosions caused by industrial blasting. Deep wells and large reservoirs inject high-pressure water, which increases the crustal pressure and sometimes causes earthquakes.