摘要
本文利用Sato单次散射模型,研究1999年至2007年辽宁海城-岫岩地区尾波Q值随时间的变化情况及1999年岫岩5.4级地震和2000年5.1级两次中强地震发生阶段该地区的尾波Q值变化。计算结果表明:该区在地震活跃阶段,Qc值随时间变化起伏较大,平均值相对较高,在岫岩5.4级主震前有短时升高现象,之后Qc值并没有明显的降低,直到强余震序列结束之后Qc值逐步降低,趋于平稳,通过对比该区在地震活跃阶段与平静阶段的Qc值变化,可以为未来该区的强震预测提供参考依据。
The changes of quality factor Q was studied using the single scattering attenuation model of Sato in Liaoning Haicheng - Xiuyan region from 1999 to 2007 and before and after the two strong earthquakes in 1999 Xiuyan MsS.4 and in 2000 Xiuyan MsS.1. The results show that： in the seismic active phase, Q value changes more ups and downs over time and maintains high average value. Before the main shock Xiuyan MsS.4 Q value increased in the short-term and after reduced no apparently until the strong aftershock sequence was end gradually and stabilized. By comparing Q value in the seismic active and quiescence phase we can deduce that Q value changes before earthquake can be used in earthquake prediction for the future of the area.
出处
《东北地震研究》
2008年第2期11-17,共7页
Seismological Research of Northeast China
基金
辽宁省重大科研项目子项目(2008-k-04)
