【摘要】 本文通过对首都圈地区(北纬38.5°至41.0°,东经113.0°至120.0°)公元1500年以来M≥5地震的系统分析,并应用70年代以来所取得的该地区最新地球物理场的有关资料进行分区后,发现该地区5级以上地震存在较明显的成组发生及有11年的时段性活动特征。且每一组的活动具有地区性特征。这一现象对首都圈地区5级以上地震的监视预报具有一定的意义。更多还原

【Abstract】 By means of studying the spatial and temporal characteristics of seismicity (M≥ 5) in Capital Circle Area (38.5-41 ?N, 113-120 ?E) since 1500, and studying the zoning with the new geophysical data in this area, the author found that the earthquakes with M≥5 in this area often occurred in groups and each group would have its own regional characteristics. The cycle of seismicity is about 11 years. This result has practical significance in monitoring and predicting the earthquakes (M≥5) in Capital Circle Area.更多还原