摘要
基于地震波及震相到时数据,经地震精定位及震中位置归一处理,给出了冀鲁豫交界地区地壳介质的微动态变化过程。结果显示,该区中等地震前部分台站记录丛集地震P波走时差滑动平均值出现中短期负异常,即地壳介质速度升高,显示出不同方位地壳介质承压状态存在差异。
On the basis of seismic waveform and phase arrival time data, by accurately locating and normalizing the position of clustered earthquakes, the crustal medium micro-dynamic change in the placebonder on Ji-Lu- Yu 3 provinces were given. The results show that the moving averages of P-wave travel-time appears negalively anomalous in medium and short terms before moderate earthquakes, i.e. the travel-velocity of crustal media raised. It means that the artesian conditions of crustal medium in different directions can be different from each other.
出处
《大地测量与地球动力学》
CSCD
北大核心
2012年第B08期45-48,共4页
Journal of Geodesy and Geodynamics
基金
2012年度国家科技支撑计划项目(2012BAK19B04)
山东省地震局合同制项目(2011Y10)
关键词
丛集地震
濮阳地震集中区
地壳介质
P波走时差
射线追踪
clustered earthquake
Puyang earthquake concentrating area
crustal medium
P-wave travel-time difference
ray tracing
