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１９８８年至１９９０年，青海地区发生了４次震级大于６０的地震，本文利用全球数字地震台网（ＧＤＳＮ）的宽频带波形资料，通过波形模拟，结合地质构造的背景资料对这几个地震的震源破裂和发震构造背景进行了研究。通过台站的视震源时间函数（ａＳＴＦ）和视时间差（ａＴＤ）的分析，特别对震源的复杂性进行了讨论。本文的研究从震源分析的角度进一步支持了青藏高原东北部构造应力的压力轴为接近水平的ＮＥ方向，而随着向青藏高原北部的推移其构造应力的压力轴逆时针变为接近水平的ＮＥＥ或ＮＳ方向的结论。
From 1988 to 1990, four earthquakes with magnitudes larger than 60 occurred in Qinghai area. Based on the wideband waveform data of Global Digital Seismic Network (GDSN) and the waveforms, combined with the background information of geological structure, Seismogenic earthquake rupture and seismogenic tectonic setting were studied. In particular, the complexity of the source is discussed by the Stationary Source Time Function (aSTF) and Time Difference of Arrival (aTD) analysis. The study in this paper further supports that the pressure axis of the tectonic stress in the northeastern Qinghai-Tibet Plateau is close to the NE direction from the point of view of focal point analysis. As the pressure axis of tectonic stress to the north of the Qinghai-Xizang Plateau changes counterclockwise to near-horizontal NEE Or NS direction of the conclusion.