Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2018, Vol. 54 ›› Issue (3): 511-520.DOI: 10.13209/j.0479-8023.2017.092

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Numerical Study on Effects of Lateral Variations of Moon Crustal Thickness on Lunar Seismic Wave Propagation

CHEN Fei, WANG Yanbin   

  1. Department of Geophysics, School of Earth and Space Sciences, Peking University, Beijing 100871
  • Received:2017-02-23 Revised:2017-04-18 Online:2018-05-20 Published:2018-05-20
  • Contact: WANG Yanbin, E-mail: ybwang(at)


陈飞, 王彦宾   

  1. 北京大学地球与空间科学学院地球物理系, 北京100871
  • 通讯作者: 王彦宾, E-mail: ybwang(at)
  • 基金资助:


A 2-D staggered grid pseudospectral and finite difference hybrid method is applied to perform numerical simulations of lunar seismic wave propagation in a laterally heterogeneous crustal Moon model. The relief of lunar crust and mantle interface is defined with different height, width and position based on the present lunar structural models. The effects of these factors on lunar records are discussed, respectively. How the lateral variations of Moon crustal thickness affects the strong wave coda of lunar signals is revealed. The results show that the height of the relief dominates the formation of strong wave coda, greatly affects the duration time and amplitude of the coda. The width of the relief has impact on the amplitude. The effect of position of the relief is complex, not only affecting the travel time of P and S waves, but also the duration time and amplitude of the coda.

Key words: lunar structure, lunar seismic wave propagation, numerical modeling, Moon crustal thickness variations


采用基于交错网格的二维伪谱与有限差分混合的方法, 根据现有的月球结构研究结果, 设计月壳?月幔分界面起伏的模型, 模拟浅震和深震月震波在不同起伏高度、宽度和位置情况下的传播, 讨论不同起伏高度、宽度和位置对月震信号传播的影响, 揭示月壳厚度横向变化对月震波形成强烈尾波的作用。结果表明: 起伏高度起主导作用, 主要影响尾波振幅和持续时间; 起伏宽度主要影响尾波振幅; 起伏位置的影响机制较为复杂, 不仅影响直达波到时, 还影响尾波振幅和持续时间。

关键词: 月球结构, 月震波传播, 数值模拟, 月壳厚度变化

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