摘要
通过对辽宁地区1970年以来的11次Ms≥4.6地震的小震调制比的时空变化分析,发现在11次中强震例中,有4次地震表现出调制比异常,震中位于异常区域150km范围内,异常通常会在主震一年前出现,对辽宁地区中强地震预测发生有一定的指示意义,地震发生对应率为44.4%,小震调制比异常空间演化过程中,表现出高值异常显著强度减弱、异常区域收缩的现象。
The modulation ratio method is employed to carry out spatio-temporal scanning for 11 earthquake with M_(S)≥4.6 since 1970 in Liaoning area.The results indicate that four of the eleven earthquakes showed abnormal modulation ratios and the earthquake epicenter located abnormal area range within 150km.The seismic correspondence ratio is 44.4%.The abnormal modulation ratio has a certain indicative significance for moderate and strong earthquakes in Liaoning area.In the spatio-temporal evolution of earth tide modulation ratio,the abnormal intensity of high value was weakened and the abnormal area was decreased.
作者
邵媛媛
杨士超
王岩
钱蕊
毛佳宁
SHAO Yuan-yuan;YANG Shi-chao;WANG Yan;QIAN Rui;MAO Jia-ning(Liaoning Earthquake Agency,Liaoning Shenyang 110034,China)
出处
《防灾减灾学报》
2021年第2期1-8,共8页
Journal of Disaster Prevention And Reduction
基金
辽宁省科学技术计划项目(2017231013)
中国地震局星火计划青年项目(XH18014Y)。
关键词
调制地震
固体潮调制比
调制异常
辽宁地区
modulated earthquake
earth tide modulation ratio
abnormal modulation
Liaoning area
