jgg     2009 29 (增刊):  66-71    ISSN: 0412-1961  CN: 21-1139/TG ORIGIN AND CAUSE OF GENERATION OF WENCHUAN Ms8.0 EARTHQUAKE Yu Zhendong Hubei Research Institute of Environmental Sciences, Wuhan 430072 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null