Data relevant to the shallow structure of the moon obtained at the Apollo seismic stations are compared with previously published results of the active seismic experiments. It is concluded that the lunar surface is covered by a layer of low seismic velocity which appears to be equivalent to the lunar regolith defined previously by geological observations. This layer is underlain by a zone of distinctly higher seismic velocity at all of the Apollo landing sites. The regolith thicknesses at the Apollo 11, 12, and 15 sites are estimated from the shear-wave resonance to be 4.4, 3.7, and 4.4 m, respectively. These thicknesses and those determined at the other Apollo sites by the active seismic experiments appear to be correlated with the age determinations and the abundances of extralunar components at the sites.


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    Title :

    Shallow lunar structure determined from the passive seismic experiment


    Contributors:
    Nakamura, Y. (author) / Dorman, J. (author) / Duennebier, F. (author) / Lammlein, D. (author) / Latham, G. (author)

    Publication date :

    1975-07-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    Passive lunar seismic experiment

    Ewing, M. / Kovach, R. / Press, F. et al. | NTRS | 1964


    Moonquakes and lunar tectonism results from the Apollo passive seismic experiment.

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    A LUNAR SEISMIC EXPERIMENT

    Buwalda, P. / Neugebauer, M. / Press, F. | NTRS | 1960


    Active lunar seismic experiment

    De Noyer, J. M. / Simmons, G. | NTRS | 1964


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    Kovach, R. L. / Watkins, J. S. / Talwani, P. | NTRS | 1973