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Seismic data from man-made impacts on the moon.

G Latham, M Ewing, J Dorman

    Science (New York, N.Y.)
    |November 6, 1970
    PubMed
    Summary
    This summary is machine-generated.

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    Apollo 12 seismic data reveal the Moon

    Area of Science:

    • Seismology
    • Lunar Science
    • Geophysics

    Background:

    • Apollo 12 astronauts deployed a seismic station on the lunar surface.
    • Seismic data capture lunar impacts and natural seismic events.

    Purpose of the Study:

    • To analyze seismic reverberations from lunar impacts.
    • To understand the seismic properties of the lunar mare near the Apollo 12 landing site.
    • To investigate the Moon's shallow subsurface structure.

    Main Methods:

    • Analysis of seismic wave propagation from lunar impacts.
    • Interpretation of seismic signals including reverberations and natural events.
    • Modeling of seismic velocities and wave absorption.

    Main Results:

    Related Experiment Videos

    • Unusually long reverberations were recorded from lunar impacts.
    • Lunar mare seismic velocities increase with depth to 5-6 km/s at 20 km.
    • Extremely low seismic wave absorption observed in the lunar mare.
    • No major crust-mantle boundary detected in the outer 20 km.
    • Scattering of surface waves suggests heterogeneity in the lunar mare.

    Conclusions:

    • Lunar seismic reverberations are likely caused by surface wave dispersion and scattering.
    • The Moon's outer 20 km is heterogeneous, lacking a distinct crust-mantle boundary.
    • Seismic data provide insights into the Moon's internal structure and composition.