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计算了兰州台阵不同频率的台阵响应函数,对台阵附近不同方位的4个小震进行了FK分析。结果显示兰州台阵2 Hz以下的台阵响应函数在原点附近呈现出对称的单主峰图样,而高于2Hz时台阵响应函数出现较多旁瓣,表明该台阵对于2 Hz以下的信号具有较好的分辨能力。小震的FK分析结果表明,根据甘肃省地震局地震目录和IASP91速度模型计算得到P波方位角和慢度与FK分析的结果总体上比较一致,但也存在一定差别,这种差别可能由所使用的理论模型和当地模型有差别以及未做台阵校正所引起。
The array response functions of Lanzhou array at different frequencies were calculated and FK analysis was performed on four small earthquakes with different azimuths near the array. The results show that the array response function of Lanzhou array below 2 Hz shows a symmetrical single main peak pattern near the origin, while the array response function of more than 2 Hz shows more side lobes, indicating that the array has the following characteristics for signals below 2 Hz Better resolution. The results of FK analysis of small earthquakes show that the azimuths and slownesses of P-waves calculated from the seismological catalog of Seismological Bureau of Gansu Province and the IASP91 velocity model are generally consistent with the results of FK analysis, but there are also some differences, which may be caused by The theoretical model used differs from the local model and is not caused by the alignment of the array.