摘要
定义了描述中等地震活动增强的3个参量E、T和R,通过对辽宁地区13次ML≥5.0地震的统计分析,结果显示,辽宁地区Mi≥5.0地震前确实存在中等地震活动增强的现象,且主震77%发生在中等地震增强活动中的最后一次中等地震后3个月内,震中距离第一次或最后一次中等地震震中约5~70km,概率80%。震级与中等地震增强活动参数E,T,R有关。
In this paper, with statistics analysis of 13 earthquakes (ML≥5.0) in Liaoning Province, three parameters (E, T, and R), which are used to describe the activities of medium earthquakes are defined. The final result shows that the frequency of medium earthquakes become higher before each main earthquake (ML≥5.0) occurred in Liaoning Province. It also shows that 77% of the main earthquakes occurred in 3 months since the last medium earthquake of those medium earthquake activities, and 80% of the main earthquake epicenters are located in the range of 5-70 km around the first/last medium earthquake epicenter. The magnitude of main earthquake is relative with parameter E, T, and R of medium earthquake activities.
出处
《地震地磁观测与研究》
2009年第2期22-30,共9页
Seismological and Geomagnetic Observation and Research
基金
该文由国家“十一五”科技支撑项目中的2006BAC01B03-04-03子专题资助,专题题目:华北构造区强震预测预警技术和指标研究
关键词
中等地震
参量
震中
medium earthquake, parameter, epicenter