首页|期刊导航|中国地震研究(英文版)|Heterogeneous Features of Temporal and Spatial Variation of Earthquake Occurrence in Process of Earthquake Preparation
中国地震研究(英文版)2001，Vol.15Issue(1)：47-56,10.
Heterogeneous Features of Temporal and Spatial Variation of Earthquake Occurrence in Process of Earthquake Preparation
Heterogeneous Features of Temporal and Spatial Variation of Earthquake Occurrence in Process of Earthquake Preparation
摘要
Abstract
By applying the GL-value, a parameter describing the heterogeneities in temporal and spatial distribution of moderate and small earthquakes prior to strong earthquakes, the following problems have been studied in the present paper: a systematic investigations have been made on the features of spatial distribution and temporal variation of the high value anomalies ( GL ≥1.0) prior to 28 moderately strong earthquakes with Ms ≥5.0 in the North China region; a systematic study has been made on the reasonability of the lower limit of magnitude, the time window and the space window for calculations at various seismicity levels in this region; the parameters taken in the calculation have been optimized and modified; the anomalous variations of GL-value prior to various moderately strong earthquakes in North China region have been investigated and followed, using the total time-space scanning method. The results of the study have shown that for 82 % of the moderately strong earthquakes in the North China region, obvious anomalous region with high GL-values appears near the future epicenter about 1 ～ 3.5 years before the earthquakes. The earthquakes usually occur in the marginal area of the anomalous zone or near it. Temporal variations of the GL-values in the anomalous zone show that the duration of anomalous ranges between 3 ～ 25 months with a predominant interval of 5 ～ 19 months, into which about 70% the total anomalies fall. The predominant interval of earthquake occurrences is 0 ～ 14 months after ending of the anomaly, into which about 83 % of the total anomalies fall. Based on these results the GL-value method is considered to be a rather effective prediction method for moderately strong earthquakes in the North China region.关键词
Seismicity/Heterogeneity/GL-valueKey words
Seismicity/Heterogeneity/GL-value分类
天文与地球科学引用本文复制引用
Huang Yun ,Gao Xu,Xie Huazhang..Heterogeneous Features of Temporal and Spatial Variation of Earthquake Occurrence in Process of Earthquake Preparation[J].中国地震研究(英文版),2001,15(1):47-56,10.基金项目
This research was sponsored by the project of "Ninth Five-year Plan" (95-04-06-04), China Seismological Bureau, China. （95-04-06-04）
