Are the Lunar Seismic Signals compatible with a Deep Layer of Fine Powder?

Details Are the Lunar Seismic Signals compatible with a Deep Layer of Fine Powder? Are the Lunar Seismic Signals compatible with a Deep Layer of Fine Powder?

Dec 1972

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972natur.240..458j&link_type=abstract

Nature, Volume 240, Issue 5382, pp. 458-459 (1972).

Physics

1

Scientific paper

THE seismic wave velocity may vary with depth in the Moon in the way derived from the lunar seismic signals by Toksöz et al.1. It is customary to seek sudden changes in velocity and interpret these as evidence for sudden changes in mineral type. Here it is shown that one such sudden change at 25 km and the more gradual increase in velocity from the surface to it can be interpreted in terms of a single type of material, namely the fine rock powder that is so abundant on the lunar surface. Gold and Soter2 have shown how such a deep powder layer can give rise to the general features of the lunar seismic signals, which are clearly so different from those seen in the Earth.

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