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China Geological Survey: Wenchuan earthquake causes has preliminary conclusion
2008-05-18 18:20:37
social commentary in the Hongkong on 18 May,[link widoczny dla zalogowanych], and China Geological Survey Bureau of the initial monitoring and assessment, the Wenchuan earthquake was the India plate subduction to Asia,[link widoczny dla zalogowanych], caused by the rapid uplift of the Tibetan Plateau result, the focal depth of 10 km -- 20 kilometers, longer duration,[link widoczny dla zalogowanych], so destructive great.
the Xinhua News Agency reported,[link widoczny dla zalogowanych], since 15,[link widoczny dla zalogowanych], secondary analysis of geological disasters China Geological Survey Bureau held Wenchuan earthquake induced, China Aero Geophysical Survey and Remote Sensing Center,[link widoczny dla zalogowanych], China Geological Environmental Monitoring Institute, Chinese Academy of Geological Sciences, Chinese Academy of Geological Sciences geology, geological mechanics and other units of the experts according to the investigation and monitoring evaluation results, the disaster "consultations" on the initial formation of the three conclusion.
a India plate subduction to Asia, caused by the rapid uplift of the Qinghai Tibet plateau. Plateau material to the east the slow flow, along the eastern edge of the plateau of Longmen mountain structural belt eastward extrusion, in Sichuan Basin under rigid block of block,[link widoczny dla zalogowanych], caused by tectonic stress the long-term accumulation of energy, finally in Longmen Beichuan mountain - Yingxiu sudden release.
two is thrust, dextral, squeeze fault earthquake. Seismogenic structure is the central Longmen Shan fault zone,[link widoczny dla zalogowanych], in the extrusion stress,[link widoczny dla zalogowanych], from southwest to North East thrust movement; the earthquake is a one-way breakdown of the earthquake, by Nancy East migration northward, resulting in the North East aftershocks to the expansion; squeeze thrust earthquake in the main shock, stress and the spread of the release process slowly, the aftershocks could lead to greater intensity, longer duration.
three is shallow source earthquake. Wenchuan earthquake does not belong to the effects of deep plate boundaries, in the brittle crust,[link widoczny dla zalogowanych], toughness conversion zone,[link widoczny dla zalogowanych], focal depth of 10 km 20 km, devastating huge.
related topics: a magnitude 8 earthquake in Wenchuan County,[link widoczny dla zalogowanych], Sichuan
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After the incident, the foreign ministry and other related departments quickly launched the emergency mechanism, instructed Chinese embassies and consulates to verify, and notify the relevant countries, and actively carry out rescue work.
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