The gross structure of the moon may be determined from natural seismic events, supplemented by artificial impacts at close ranges. The moon has a rigid mantle below a layered crust. At a depth of 500-850 km there is a decrease in S-velocity and an increase in attenuation; the preferred depth for this change is 600 km. The simultaneous occurrence of these phenomena indicates a small amount of melt below this depth. Deep focus moonquakes lie below the decrease in S-velocity at depths of about 650-950 km. Good estimates of the depth of shallow focus moonquakes are not available, but they may be releasing tectonic stress.


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    Title :

    Natural lunar seismic events and the structure of the moon


    Contributors:

    Conference:

    Lunar Science Conference ; 1975 ; Houston, TX


    Publication date :

    1975-01-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




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