Apollo 14 and 16 active seismic experiments, Apollo 17 lunar seismic profiling.

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dc.date.accessioned 2017-08-09T14:44:19Z
dc.date.available 2017-08-09T14:44:19Z
dc.date.issued 1976
dc.description.abstract Seismic refraction experiments were conducted on the moon by Apollo astronauts during missions 14, 16, and 17. The data indicate that fragmentation and comminution caused by meteoroid impacts has produced a layer of remarkably uniform seismic properties moonwide. Brecciation and high porosity are the probable causes of the very low velocities observed in the lunar regolith. Apollo 17 seismic data revealed that the seismic velocity increases very rapidly with depth. Such a large velocity change is suggestive of compositional and textural changes and is compatible with a model of fractured basaltic flows overlying anorthositic breccias. 'Thermal' moonquakes were also detected at the Apollo 17 site. The source of these quakes could possibly be landsliding.
dc.description.sponsorship Contract No. NAS 9-5632
dc.description.tableofcontents Introduction -- A Seismic Refraction System for Lunar Use -- A Lunar Engineering Seismic System -- The Active Seismic Experiment -- Seismic Data from Man-Made Impacts on the Moon -- Active Seismic Experiment (Apollo 14 Preliminary Science Report) -- Apollo 14 Active Seismic Experiment -- Active Seismic Experiment (Apollo 16 Preliminary Science Report) -- The Velocity Structure of the Lunar Crust -- The Lunar Seismic Profiling Experiment -- Lunar Seismic Profiling Experiment (Apollo 17 Preliminary Science Report) -- Apollo 17 Seismic Profiling: Probing the Lunar Crust -- Seismic Investigation of the Lunar Regolith -- The Structure of the Lunar Crust at the Apollo 17 Site -- Lunar Near Surface Structure -- Energy, Frequency and Distance of Moonquakes at the Apollo 17 Site.
dc.format.extent 168 pages
dc.format.mimetype application/pdf
dc.identifier.other 31111000525459
dc.identifier.uri https://hdl.handle.net/2060/19760018052
dc.identifier.uri https://hdl.handle.net/20.500.11753/822
dc.language.iso en
dc.publisher Department of Geophysics. Stanford University.
dc.relation.ispartofseries NASA contractor report ; NASA CR-147760.
dc.subject.lcsh Lunar geology
dc.subject.lcsh Active Seismic Experiment (Instrument)
dc.title Apollo 14 and 16 active seismic experiments, Apollo 17 lunar seismic profiling.
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