The moon

, Volume 9, Issue 1–2, pp 11–29 | Cite as

Seismic scattering and shallow structure of the moon in oceanus procellarum

  • Anton M. Dainty
  • M. Nafi Toksöz
  • Kenneth R. Anderson
  • P. Jacques Pines
  • Y. Nakamura
  • G. Latham
Article
Received:

Abstract

Long, reverberating trains of seismic waves produced by impacts and moonquakes may be interpreted in terms of scattering in a surface layer overlying a non-scattering elastic medium. Model seismic experiments are used to qualitatively demonstrate the correctness of the interpretation. Three types of seismograms are found, near impact, far impact and moonquake. Only near impact and moonquake seismograms contain independent information. Details are given in the paper of the modelling of the scattering processes by the theory of diffusion.

Interpretation of moonquake and artificial impact seismograms in two frequency bands from the Apollo 12 site indicates that the scattering layer is 25 km thick, with a Q of 5000. The mean distance between scatterers is approximately 5 km at 25 km depth and approximately 2 km at 14 km depth; the density of scatterers appears to be high near the surface, decreasing with depth. This may indicate that the scatterers are associated with cratering, or are cracks that anneal with depth. Most of the scattered energy is in the form of scattered surface waves.

Keywords

Surface Layer Frequency Band Surface Wave Seismic Wave Elastic Medium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© D. Reidel Publishing Company 1974

Authors and Affiliations

  • Anton M. Dainty
    • 1
  • M. Nafi Toksöz
    • 1
  • Kenneth R. Anderson
    • 1
  • P. Jacques Pines
    • 1
  • Y. Nakamura
    • 2
  • G. Latham
    • 2
  1. 1.Dept. of Earth and Planetary SciencesMassachusetts Institute of TechnologyCambridgeUSA
  2. 2.Marine Biomedical InstituteUniversity of Texas at GalvestonGalvestonUSA

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