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Apollo 17 seismic profiling: probing the lunar crust.

R L Kovach, J S Watkins

    Science (New York, N.Y.)
    |June 8, 1973
    PubMed
    Summary
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    Apollo 17 seismic data reveal a stepwise increase in seismic velocity below the Taurus-Littrow region. This indicates a lunar crust structure with approximately 1200 meters of mare basalts and high-velocity material underneath.

    Area of Science:

    • Lunar geology
    • Seismology
    • Planetary science

    Background:

    • Understanding the Moon's subsurface structure is crucial for planetary evolution studies.
    • Previous seismic investigations have provided limited resolution of the lunar crust.

    Purpose of the Study:

    • To interpret Apollo 17 seismic data to determine lunar crustal structure.
    • To analyze seismic velocity variations beneath the Taurus-Littrow region.

    Main Methods:

    • Analysis of seismic data collected during the Apollo 17 mission.
    • Interpretation of seismic wave propagation to infer subsurface layering and properties.

    Main Results:

    • A distinct stepwise increase in seismic velocity was observed beneath the Apollo 17 site.

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  • The mare basalts at Taurus-Littrow are estimated to be approximately 1200 meters thick.
  • High seismic velocities (around 4 km/s) characterize the material directly below the basalts.

    • Conclusions:

    • The seismic data delineate a layered structure within the lunar crust at the Apollo 17 landing site.
    • The findings provide insights into the composition and structure of the lunar subsurface in the Taurus-Littrow valley.