Shallow moonquakes: depth, distribution and implications as to the present state of the lunar interior.
Shallow moonquakes: depth, distribution and implications as to the present state of the lunar interior.
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发表时间：
1979
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通讯作者：
Yosio Nakamura;G. Latham;H. Dorman;A. K. Ibrahim;J. Koyama;P. Horváth
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作者：
Yosio Nakamura;G. Latham;H. Dorman;A. K. Ibrahim;J. Koyama;P. Horváth
观测到的 HFT（高频远震）事件的地震振幅并不像表面震源预期那样随距离变化，而是与月球上地幔的震源一致。因此，月球上地幔是目前唯一一个因月球内部差异热收缩和膨胀而产生的构造应力高到足以引起月震的区域。浅层月震震中的分布表明可能与冲击盆地存在相关性，这意味着冲击盆地在形成后很长一段时间内仍具有持久的构造影响。现在分配给这些浅层月震的有限深度需要进一步修改月球内部的地震结构模型。
The observed seismic amplitudes of HFT (high-frequency teleseismic) events do not vary with distance as expected for surface sources, but are consistent with sources in the upper mantle of the moon. Thus, the upper mantle of the moon is the only zone where tectonic stresses deriving from differential thermal contraction and expansion of the lunar interior are presently high enough to cause moonquakes. The distribution of shallow moonquake epicenters suggests a possible correlation with impact basins, implying a lasting tectonic influence of impact basins long after their formation. The finite depths now assigned to these shallow moonquakes necessitate further revision to the seismic structural model of the lunar interior.