1Application of double-difference relocation technique to aftershocks of 2008 Wenchuan earthquake using waveform cross-correlationLü Peng, Ding Zhifeng, Zhu Lupei407-4192A study on stress magnitude in the source region of American 1992 Landers earthquakeSheng Shuzhong, Wan Yongge420-4303Basement structure of southeastern boundary region of Sichuan-Yunnan active block: Analysis result of Yanyuan-Xichang-Zhaojue-Mahu deep seismic sounding profileYang Zhuoxin, Wang Fuyun, Duan Yonghong, Zhang Chengke, Zhao Jinren, Zhang Jianshi, Liu Baofeng431-4424Joint inversion of seismic and gravity data and its effect: Taking the Tianjin-Beijing-Chicheng seismic profile as an exampleLiu Hao, Fang Shengming, Jia Shixu443-4505Analysis on variation of electric field spectrum at cut-off frequency before strong earthquakes: Taking 2006 Tonga Mw8.0 earthquake as an exampleZhang Xuemin, Zeren Zhima, Shen Xuhui, Cai Juntao, Zhao Shufan, Xiong Pan, Chen Huaran, Ouyang Xinyan451-4606Experimental observation and preliminary data analysis of vertical geo-electric fieldWang Lanwei, Zhang Shizhong, Kang Yunsheng, An Haijing461-4707Study on extracting medium-term precursory anomalies from water radon and water level observation with wavelet analysisGu Shenyi, Zhang Hui471-4828Coseismic displacement analysis of the 2008 Wenchuan earthquake based on sub-pixel matching using ASAR imagesJiang Wenliang, Liu Bin, Zhang Jingfa, Gong Lixia, Luo Yi483-4919Asymmetric disaster distribution and its cause analysis of the Ms8.0 Whenchuan earthquakeZhou Qing, Zhang Chunshan, Chen Xiancheng492-50410Abnormal gas well pressure of Zhongba gas field, Sichuan,before and after the Wenchuan earthquakeYang Maling, Chen Daqing, Huang Yuanmin, Gong Huiling505-51411A study on seismic intensity scale of Chinese historical earthquakesYan Jiaquan, Zhang Zhizhong, Wang Jian, Wen Zengping, Yu Yanxiang, Liu Aiwen, Pan Hua, Lü Hongshan, Hao Yuqin515-53112A preliminary study on searching key rescue target after mainshock based on high-resolution remote sensing imageLi Yigang532-53813Ground motion effect analysis of airgun sourceLiu Bideng, Li Xiaojun, Zhou Zhenghua, Liu Peixuan, Wang YushiResearch Note539-54414Discovery and significance of natural deformation vestige on Taosi ruins in Xiangfen County, Shanxi Province, ChinaYao Daquan, He Nu, Chen Anguo, Gao Jiangtao, Zheng HaigangResearch Note545-54915Quick moment tensor solutions for 27 moderate and large earthquakes of November 2009-November 2010Liu Chao, Xu Lisheng, Chen Yun-taiResearch Note550-55216Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (March-April, 2011)Chen Peishan553-556