5.12汶川地震(英文版).docVIP

5.12 Wenchuan earthquake Seismic parameters Time: at 14:28 on May 12, 2008 04.0 seconds Latitude: 31.0 ° N Longitude: 103.4 ° E Depth: 33 km Richter: Richter 8.0 The greatest intensity: 11 degrees Epicenter: Yingxiuwan town of Wenchuan County, Sichuan Dujiangyan city, 21 km (267 °) northwest worship City 48 km (327 °) Dayi County, northwest 48 km (346 °) northwest of Chengdu 75 km (302 °) Historical background: Wenchuan earthquake in China since the founding of Chinas most since a strong earthquake, the direct and serious disaster-stricken areas of 100,000 square kilometers Earthquake causes: CAS researcher at the Institute of Geology and Geophysics, the Qinghai-Tibet Plateau Research Wang Wenchuan 27 pairs more familiar with regional geological structure, in early May has been Wenchuan area. He analyzed that Wenchuan earthquake occurred in the southeast edge of the Qinghai-Tibet Plateau, western Sichuan Longmenshan the center, located in Wenchuan - Timor-mao on the fault zone. Indian Ocean plate northward movement, squeezing the Eurasian plate, causing uplift of the Qinghai-Tibet Plateau. At the same time in the uplift of the plateau, also eastward movement, squeezing the Sichuan Basin. Sichuan Basin is a relatively stable block. Although the main looks Longmenshan tectonic activity is not strong, but the stress may be stored in the process of accumulation to a certain extent, the crust will break down, so the earthquake. The U.S. Geological Survey also released the news that the earthquakes epicenter and focal mechanisms and Longmenshan fault or a related movement of tectonic fault in line, the earthquake is a thrust to the northeast of the campaign results. From the mainland scale, Central Asia and East Asia, the seismic activity is due to the Indian Ocean plate collision of the Eurasian Plate. Southern California Earthquake Research Center, Professor Li Yonggang told Xinhua, Longmenshan fault zone is earthquake-prone region of active faults, from th