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利用单台 3分向数字化记录反演了 1996年 6月 1日甘肃天祝 -古浪 5 .4级地震的矩张量 ,并对所得结果与用 P波初动符号的结果进行了比较。结果表明 ,二者具有很好的一致性。结合该地震的震源机制和震源区的断层构造情况 ,认为该地震是在 NE- SW的压应力作用下 ,近 EW向的海原西断层天祝 -古浪段左旋破裂错动的结果。由于我们得出的结果只是利用了记录波形的最初几个波形 ,因此它基本反映了该地震的初始破裂错动情况。
Using a single 3-point digital record, the moment tensor of the Tianzhu-Gulang earthquake of June 1, 1996, June 1, 1996 was retrieved and the results were compared with those of the P-wave prime mover. The results show that the two have good consistency. According to the source mechanism of the earthquake and the fault structure in the source area, the earthquake is considered to be the result of the left-lateral failure of the Tianzhu-Gulang section of the Haiyuanxi fault in the near EW under the compressive stress of NE-SW. Since our results only use the first few waveforms of the recorded waveform, it basically reflects the initial rupture of the earthquake.