5 12 Wenchuan Earthquake, also known as "Wenchuan Earthquake", occurred on May 2008 12 Beijing time 14: 28.4, and its epicenter was located in Yingxiu Town, Wenchuan County, Aba Tibetan and Qiang Autonomous Prefecture, Sichuan Province (310 north latitude and 0/0 east longitude).

According to the revised data of Seismological Bureau of China, the magnitude of surface wave of Wenchuan earthquake on 5. 12 was 8.0. According to the data of Japan Meteorological Agency, the seismic wave of Wenchuan earthquake on May 12 confirmed that * * * circled the earth 6 times.

Since 2009, May 12 has been designated as the National Disaster Prevention and Mitigation Day. The establishment of "Disaster Prevention and Mitigation Day" in China, on the one hand, is to comply with the demands of all sectors of society for disaster prevention and mitigation in China, on the other hand, it is also to remind citizens to remember the past and learn from the future, pay more attention to disaster prevention and mitigation, and strive to reduce disaster losses.

Cause of earthquake:

5. 12 Wenchuan earthquake and southeast thrust of Longmen Mountain were driven by the collision between India plate and Eurasia and its northward thrust. The relative movement between these plates leads to large-scale structural deformation within the Asian continent, which leads to the shortening of the crust, the uplift of the landform and the eastward compression of the Qinghai-Tibet Plateau.

Because the Qinghai-Tibet Plateau was strongly blocked by the active block in South China of Sichuan Basin during the northeast movement, the stress was highly accumulated in Longmenshan nappe structure belt, so that it suddenly dislocated along Yingxiu-Beichuan fault and a strong earthquake of magnitude 8.0 occurred.