摘要
根据辽宁地区历史地震和近代小震资料,系统总结了辽宁地区地震活动特征,主要有M≥5.0地震空间分布集中、时间分布成丛;M≥6.0地震存在准周期性;ML≥4.5地震具有成丛性;M≥5.0地震前中等地震集中活跃;震群较活跃;M≥5.0地震前多数出现ML≥3.0地震空区或条带等。在此基础上,基于1970年以来辽宁地区5级地震震例,对这些活动特征的震兆意义进行了定性与定量的分析与研究。
According to the historical seismics and the modern small earthquakes data in Liaoning area,the characteristics of seismic activity in Liaoning area are summarized systematically,mainly including:The spatial distribution of M≥5.0 seismics are concentrated and time distribution are grouped;The M≥6.0 seismics have quasi-period;The ML≥4.5 earthquakes have clustering;Medium earthquakes are concentrated and active before the M≥5.0 seismic;The earthquake swarm is more active;Most of the ML≥3.0 earthquake gaps or belts appeared before M≥5.0 seismic,etc.On this basis,this paper makes a qualitative or quantitative analysis and research on the precursor significance of these characteristics based on the M≥5.0 earthquake cases in Liaoning area since 1970.
作者
曹凤娟
李彤霞
杨士超
王松阳
李梦莹
CAO Feng-juan;LI Tong-xia;YANG Shi-chao;WANG Song-yang;LI Meng-ying(Liaoning Earthquake Agency,Liaoning Shenyang 110034,China)
出处
《防灾减灾学报》
2019年第A01期1-7,共7页
Journal of Disaster Prevention And Reduction
基金
辽宁省社会攻关及产业化项目“辽宁地区震源参数和地壳结构的详细研究”(2017231013)
中国地震局地震预测研究所基本科研业务费专项“辽南地区断层结构和地震活动性特征研究(2018IEF010203).
关键词
地震空区
地震条带
定量
震群
earthquake gap
earthquake belt
quantitative research
earthquake swarm
