The Statistical Analysis of Migration of Strong Earthquakes-Taking the North China Region asan Example

The migration of strong earthquakes is an important research topic because the migration phenomena reflect partly the seismic mechanism and involve the prediction of tendency of seismic activity. Research on migration of strong earthquakes has mostly focused on finding the phenomena. Some attempts on getting regularity were comparatively subjective. This paper suggests that there should be indices of migration in earthquake dataset and the indexes should have statistical meaning if there is regularity in the migration of strong earthquakes. In this study, three derivative attributes of migration, i.e., migration orientation, migration distance and migration time interval, were statistically analyzed. Results in the North China region show that the migration of strong earthquakes has statistical meaning. There is a dominant migration orientation (W by S to E by N), a dominant distance ( ≤ 100kin and on the confines of 300 ～ 700km), and a dominant time interval ( ≤ la and on the confines of 3 - 4a). The results also show that the migration will differ slightly with different magnitude range or earthquake activity phase.     

地质勘察部门如何为社会主义新农村建设服务

随着我国经济社会的发展，人民生活水平的提高，党中央在全国范围内推进社会主义新农村建设，这是一个富民工程，农民生活快速实现小康的伟大举措。建设社会主义新农村的任务目标是：“农村生产力发展，农民生活水平提高，农村基础设施改善，农村社会事业发展，基层民主政治建设继续推进。”广西自治区主席陆兵在全区社会主义新农村建设试点动员大会上强调：“党的十六届五中全会提出了建设社会主义新农村的重要历史任务，中央经济工作会议和中央农村工作会议对建设社会主义新农村作出了部署，