南北地震带北段及其两侧断层现今活动性

分析了南北地震带北段及其两侧跨断层流动形变资料，研究了各断裂带的活动水平、动态过程及其与强震的关系。结果表明，南北地震带北段及其两侧现今断层平均垂直活动速率为0.19mm/a，断层活动处于第四纪以来较低水平；区域断层活动增强是强震发生的重要标志之一；强震前断层异常活动存在由外围向震中迁移的特征；南西华山-六盘山断裂带为近年可能发生强烈地震的地区。

The fault activity in recent time along northern section of North-South Seismic Belt and its both sides

In this paper we have analyzed the data of mobile geodetic deformation across faults along northern section of North South seismic belt and its both sides, and studied the activity level, dynamic evolution and relation to strong earthquakes of every fault zone. The results show that the average of fault movement rate is 0.19 mm/a along northern section of North South seismic belt and its both sides. The fault activity has been in the lower level since Quaternary period. Regional fault activity strengthening is an important symbol for occurrence of strong earthquakes. There is a feature that fault anomalous activity migrates from the outlying zone to the epicenters before strong earthquakes. Southwest Huashan Liupanshan fault zone is the potential region of strong earthquake occurrence in the near future.