1Statistical Analysis of B-values in Shandong AreaXUE Jing-nan, LI Xiang, ZHANG Bo, WANG Yong-wang1-52The Effective Extraction of Digital Seismic Signal Under the Strong Environment NoisesXIAO Ben-fu, WAN Yong-ge, QI Yu-ping6-93Application of The Complicated Fault-block Fine Structural Interpretation Technique and Its Effect in Dalujia AreaMA Yu-ge, CUI Shi-ling, CHEN Hai-yun10-144Statistical Analysis on Waveform Characteristics of Natural and Artificial EarthquakeBAO Shu-xian15-195Contrastive Study on the Effects of Seismic Imaging Exploration under Different Road Surface ConditionsLU Zi-lin, WANG Jian-xue, ZHAO Pei, GE Fu-gang20-236Analysis on Variation and Difference of Electric Field in Jiangsu ProvinceZHANG Xiu-xia, YING Xiang, GUO Jian-fang, LI Fei24-297Study on Observation Accuracy of Extensometer in Shexian SeismostationZHAO Chang-hong, ZHANG Shuang-feng, MA Guang-qing, LI Xiang-ping, JIANG Yong-jian36-398Operation Analysis of Real-time Earthquake Information System in Seismic Network of Hebei ProvinceLI Dong-sheng, MAO Guo-liang, CHANG Liang, CAI Ling-ling40-449Earthquake Prevention and Disaster Mitigation in Urban Areas of ChinaZHANG Ming, AN Shu-zhi45-4810Approaches on Publishing Earthquake Information to Sub-websitesDONG Xing-hong, JIA Ning49-5211Installing of Tj-2tpye Volume Strain Meter and Drill-hole Water Injection Test in Fuzhou Seismic StationLIN Guo-yuan53-5612Calculating Focal Depth Using Travel Time Difference of sPn and Pn PhaseMA Li, ZHANG Ling, YANG Ying, WANG Cheng-wei, ZHANG Ping-tingBriefing of Research57-6213Summary on 2010 Seismic Activity in North China and Hebei ProvinceCAI Ling-lingBriefing of Research63-64