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本文介绍了定位模型偏差对震源测定的影响的数值实验,结果表明:定位模型的偏差主要影响对浅源地震的深度的测定,对地壳下部地震深度的测定一般影响不大;如果定位模型比实际地壳结构简单,所测定的震源深度往往比实际深度偏大,反之定位的深度一般都偏浅;地壳总厚度的偏差使定位深度产生系统差,偏差和系统差基本一致;同一模型测定的深度值之间具有相对准确的定性意义,可以互相比较,不同模型测定的深度结果一般无此关系。文章最后对实验结果作了简要讨论。
In this paper, numerical experiments on the effect of positioning model deviation on source determination are introduced. The results show that the deviation of the positioning model mainly affects the determination of the depth of shallow earthquakes and generally has little effect on the determination of the depth of the earth’s crust. The crustal structure is simple, the measured depth of the focal point is often larger than the actual depth, but the depth of the positioning is generally shallow; the deviation of the total thickness of the crust makes the positioning depth produce systematic difference, deviation and system difference is basically the same; depth value With relatively accurate qualitative significance, can be compared with each other, the depth of the results of different models generally do not have this relationship. The article concludes with a brief discussion of the experimental results.