1A model of epicentral precursor gap of seismic precursor field at middle-short term stage in the north of North China areaCHE Yong-tai, YU Jin-zi, LIU Wu-zhou1-62Seismic period model and seismic risk analysis in Bohai Sea basinZHAO Gen-mo, MA Shu-qin, YANG Gang-sheng7-113Possible seismomagnetic effect existed in the geomagnetic Sq variations of the Kanoya magnetic observatoryCHEN Po-fang12-154Evolution characteristics of underground fluid anomalies before moderately strong earthquakes and its application to earthquake prediction in Shandong and its adjacent areaGENG Jie, ZHANG Zhao-dong, WEI Huan, WANG Zhong-min27-315Dynamic anomalies of groundwater and follow-up prediction before the M6.2 Ninglang earthquakeXIA Fei32-396Characteristics of near field crustal deformation anomaly at fixed point of the Jiashi strong earthquake swarm in 1997WEN He-ping40-467Features of active faults in Guangzhou region and relation to earthquake resistant engineeringCHEN Wei-guang, ZHAO Hong-mei, CHANG Yu47-568The ML4.9 Xinfengjiang earthquake,Heyuan in August 1999XU Qi-hao, MIAO Wei-cheng, ZHANG Guo-ron, QIN Nai-gang, WU Ye-biao57-619Prediction of earthquake disasters for power supply system in Hebi city,HenanLI Qing-lin, ZHANG Xiao-pu, MENG Jian-sheng62-6710Evaluation on possibility of induced earthquake for the Qiaoqi-Zhonggang Reservoir of Baoxing River in SichanCHEN Xian-cheng68-7611Strategies of short-impending earthquake prediction in economy developed coastal area of South ChinaWANG Zheng-shang, YANG Ma-ling77-8212Exploitation and service of books information of Seismological Bureau of Shanghai City under network environmentWANG Yu-Xin83-85