1Some Analyses of the Impact of Sunspots Activities on EarthquakesLIU Shuang-qing, CAO Jing-quan, ZHANG Lei, LI Yue1-72Study on Seismic Velocity Ratio Changing before Moderate-strong Earthquake in Anhui Province and Its Surrounding AreaXU Xin, LIU Dong-wang, LIU Ze-min16-193Research on A Efficient Method for Simulating Seismic Wave Based on Orthogonal HHTHU Can-yang, CHEN Qing-jun, XU Qing-yang20-244Analysis on Potential Earthquake Risk of Capital Zone Based on Multiple Seismicity ParametersWU Min-jie, ZHU Hong-bin, YUE Xiao-yuan, LIN Xiang-dong, LI Hong25-305Study on Present Activity of Longgang Volcano in Jilin ProvinceLIU Jun-qing, DING Guang, ZHANG Chen-xia, WU Cheng-zhi31-33,446Analysis on Tangshan Ms4.8 Earthquake on May 28th, 2012ZHANG Jie-qing, SHAO Yong-xin34-377Seismotectonic Characteristic of Northern-Jiangsu-Southern-Yellow-Sea BasinGUO Bin, WANG Bin, ZHANG Yue-hui38-448Study on Earthquake Induced Geological Disaster in the Western Area of Zhengzhou CityZHANG Jun, ZHANG Wei, HU Feng-ying, LUO Shou-zhan45-509Analysis on Water Level & Pressure Observation Data of Ma-17 Well Since 2000HU Jing-lei, ZHANG Zi-guang, SHENG Yan-rui51-5810Investigation on Strain Characteristics of Main Fault Zone in Yunan Area Based on Cross-fault Deformation DataZHOU Hai-tao, GUO Liang-qian59-6311Analysis on Monitoring Capability of CMG-3TB Seismometer at Some Seismic Stations in Jiangsu ProvinceHU Mi-dong64-6812Observation System Fault Analysis and Preliminary Diagnosis System Construction of the Ground Resistivity Observation SystemWANG Feng, YUAN Zhi-xiang, LI Jing69-72