【摘要】 利用滤波、仿真和小波包变换3种方法对2008年新疆乌恰M_S6.8地震和M_S6.3余震的重叠地震波形进行处理,对比分析发现小波包变换对于识别地震重叠位置效果优于其他2种方法。用小波包变换拾取M_S6.3余震震相到时,分别用3种方法进行定位,对定位结果进行比较与讨论。分析得出在空隙角、速度模型和定位方法相同的条件下,定位结果更接近于美国地质调查局的结果。小波包变换是一种精确拾取重叠地震震相位置的有效方法。更多还原

【Abstract】 Taking use of filtering,simulation and wavelet packet transform for Xinjiang Wuqia earthquake with M_S6. 8 and its aftershock with M_S6. 3,it can be found that wavelet packet method performed better than the other 2 methods in identifying overlap position. When wavelet packet transform picked up M_S6. 3 aftershock phase,these 3 methods were used to locate position which results are compared and discussed. Under the same condition of gap angle,velocity model and positioning method,it argued that results were similar to these of USGS. Wavelet packet transform was an effective method to accurately pick up position of overlapped seismic phase.更多还原