从区域性地震群体活动的韵律性、分幕性及环境因子对地震发生的作用入手，研究了华北地震总形势。
At first from rhythmic rules and episodes of regional seismicity and influence of environment factors on earthquake occurrence, the overall tendency of seismic activity have been studied.
不同的构造环境下地震活动时空分布特征具有较大差异。
In general, st distribution of earthquakes is associated with tectonic Settings.
不同构造环境下不同构造单元地震活动差异性很大。
The seismicity in different blocks under different tectonic conditions is diverse.
地震活动与小震精定位能够反应区域构造信息，与地壳介质各向异性方向的区域应力环境相对应。
Seismic activity and seismic relocation can show the regional structure information, which just correspond to the structure information shown by seismic anisotropy in crust.
结果表明，地震活动时空分布的多重分形特征与不同地球动力学环境关系密切。
The results show that the multifractal characteristics of GSRE are closely related to the geodynamic environment.
本文在研究秦皇岛市区域地震地质环境和地震活动规律的基础上，确定了区域潜在震源区及相应的地震活动性参数。
Based on the study of regional seismic environment and seismic periodicity, the potential seismic source zones and their activity parameters are determined.
地热水的开采已引起了一些自然和工程地质环境问题，主要是环境污染，地面沉降和地裂缝活动的加剧，以及地震活动性的加剧。
The main problems are environmental pollution, the intensifying of ground subsidence and ground fissures, and the intensifying of seismic activity.
地热水的开采已引起了一些自然和工程地质环境问题，主要是环境污染，地面沉降和地裂缝活动的加剧，以及地震活动性的加剧。
The main problems are environmental pollution, the intensifying of ground subsidence and ground fissures, and the intensifying of seismic activity.
应用推荐