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应用中国数字地震台网(CDSN)记录的长周期体波波形数据,反演了1988年11月6日中国云南省澜沧-耿马MS7.6地震的矩张量,求得了其震源机制和震源时间过程.反演结果表明,断层面解的一个节面是右旋走滑断层,另一个节面是左旋走滑断层;震源时间过程较简单,持续时间约15s;标量地震矩为6.4×1020N·m.根据地质资料、区域构造、野外观测和余震震中分布,确认走向313°的节面是地震断层面,主压应力轴位于几乎水平的南北向
The long-period body-wave waveform data recorded by China Digital Seismograph Network (CDSN) were used to inverse the moment tensor of the Lancang-Gengma MS7.6 earthquake on November 6, 1988 in China. The focal mechanism and Source time course. The inversion results show that one nodal plane of the fault plane is a right-lateral strike-slip fault and the other nodal plane is a left-lateral strike-slip fault. The source time is relatively simple with a duration of about 15s. The scalar seismic moment is 6.4 × 1020N · m. Based on the geological data, regional tectonics, field observations and the epicentral distribution of aftershocks, it is confirmed that the section heading toward 313 ° is the seismic fault plane and the principal compressive stress axis is located in an almost horizontal north-south direction