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在分析区域地震活动和构造环境及利用ＧＤＳＮ的宽频带波形资料分析震源破裂特征的基础上，结合余震资料，讨论了１９８８～１９９０年发生在四川和青海的９次强震的震源破裂和余震分布特征，分析了四川、青海、西藏相邻区域内的地震能量迁移，并用单键群分析方法对１９７０年以来的地震活动总体图象进行了研究。结果表明，这些地震的震源性质与构造应力环境相符，但青海地震的震源都具有较大的逆掩分量，与过去的走滑震源性质不同，而四川地震的震源Ｐ轴不接近水平方向与当地的“Ｙ”字形复杂构造有关。
Based on the analysis of seismicity and tectonic environment in the region and the broadband waveform data of GDSN, the source rupture and aftershock distribution of 9 earthquakes occurred in Sichuan and Qinghai from 1988 to 1990 were discussed based on aftershock data The seismic energy migration in the adjacent areas of Sichuan, Qinghai and Tibet was analyzed. The single-bond cluster analysis method was used to study the overall seismic image since 1970. The results show that the source properties of these earthquakes are in accordance with the tectonic stress environment, but the sources of Qinghai earthquake have large amounts of inverse masked components, which are different from those of the past strike-slip focal sources. However, the P axis of the Sichuan earthquake does not approach the horizontal direction and the local The “Y” -shaped complex structure.