华南地区弥散地震活动的评价方法与结果  

Diffuse Seismicity in the South China-Evaluation Method and Application

作　　者：韩竹军[1] 周本刚[1] 安艳芬[1] 

机构地区：[1]中国地震局地质研究所,北京100029

出　　处：《震灾防御技术》2011年第4期343-357,共15页Technology for Earthquake Disaster Prevention

基　　金：地震行业专项"核电厂地震安全问题研究"(200708003)

摘　　要：根据华南地区现今地球动力学环境、新构造特征、发震构造模型、第四纪构造活动、地球物理场等方面的差异,通过具体的实例,有针对性地论述了弥散地震区划分的方法,系统地阐述了华南地区弥散地震的评价依据。对于弥散地震区内与已知发震构造无关的最大历史地震,给出了两种情况下确定弥散地震的方法,探讨了总体地震和构造活动水平与弥散地震的关系。华南地区弥散地震活动的评价结果与地球动力学环境特征密切相关,地震构造背景的一致性是进行弥散地震类比的基础。本文除了论述弥散地震活动评价方法之外,还初步给出了华南地震区弥散地震区划分方案和弥散地震评价结果。In this paper, we discuss the differences of dynamic environment, neo-tectonics, seismogenic models, Quaternary tectonic movement and geophysical field of the South China, and their roles in dividing diffuse seismicity provinces. Considering the actual seismo-tectonic features, the conditions for evaluating the magnitudes of diffuse earthquakes are introduced systematically. As to the maximum historical earthquake with no relation to a known seismogenic tectonics in a diffuse seismicity province, two approaches are provided to determine the magnitude of diffuse earthquake. As to the relationship between the diffuse earthquakes magnitudes with the general intensity of seismic and tectonic activity, a comprehensive explanation is provided. The consistency of seismo-tectonic environment is the basis for comparison of diffuse seismicity in different province. Based on the evaluation methods and basal information, the results about the division of diffuse seismicity provinces and diffuse earthquake magnitudes are obtained.

关 键 词：华南地区 弥散地震区 弥散地震 地震构造 

分 类 号：P315[天文地球—地震学]