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本文用 P波波形分析方法对1976年 8月 22日松潘6.7级地震的破裂机制作了研究,给出了该地震的震源参数。结果表明,该地震的断层面走向为北西33°,是以倾向滑动为主带走滑成分的左旋逆掩错动,与1976年8月16日和23日松潘的两次7.2级地震的断层面参数基本相同,这说明该地震与这两次大震受同一断层活动的控制。
In this paper, the P wave analysis method was used to study the rupture mechanism of the Songpan M 6.7 earthquake on August 22, 1976, and the source parameters of the earthquake were given. The results show that the fault of the earthquakes is headed northwest by 33 ° and is a left-lateral overthrow fault that is mainly composed of dip slip, and is similar to the fault of 7.2 magnitude earthquake of Songpan on August 16 and August 16, 1976 The plane parameters are basically the same, indicating that the earthquake and the two major earthquakes by the same fault activity control.