Mathematics – Logic
Scientific paper
Jul 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975moon...13...57n&link_type=abstract
(Lunar Science Institute, Symposium on Origin and Evolution of the Lunar Regolith, Houston, Tex., Nov. 13-15, 1974.) The Moon, v
Mathematics
Logic
9
Lunar Landing Sites, Lunar Rocks, Lunar Surface, Seismic Waves, Apollo Flights, Lunar Composition, Lunar Geology, Seismographs, Seismology, Surface Properties
Scientific paper
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.
Dorman James
Duennebier Fred
Lammlein David
Latham Gary
Nakamura Yoshifumi
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