拐角频率在营海岫地区地震序列判定中的应用

Application on the corner frequency to judge the earthquake sequences occurred in Xiuyan,Haicheng and Yingkou Regions

利用拐角频率方法,研究营、海、岫地区1999年以来发生的显著震群性质,结果表明,前震序列与其他震群拐角频率曲线变化形态不同,拐角频率的大小能较好反映震源区应力场的大小。

In this paper, through calculating the corner frequency, the earthquake sequences occurred in Yingkou,Haicheng and Xiuyan since 1999 are studied. The result indicates that the change of the corner frequency curves of foreshock sequence is different from those of other earthquake swarms. The size of the corner frequency can perfectly reflect the size of the stress field in the hypocenter region. The relation between the corner frequency and magnitude is discussed in the paper.