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The Apollo passive seismic experimentThe completed data set obtained from the 4-station Apollo seismic network includes signals from approximately 11,800 events of various types. Four data sets for use by other investigators, through the NSSDC, are in preparation. Some refinement of the lunar model based on seismic data can be expected, but its gross features remain as presented two years ago. The existence of a small, molten core remains dependent upon the analysis of signals from a single, far-side impact. Analysis of secondary arrivals from other sources may eventually resolve this issue, as well as continued refinement of the magnetic field measurements. Evidence of considerable lateral heterogeneity within the moon continues to build. The mystery of the much meteoroid flux estimate derived from lunar seismic measurements, as compared with earth-based estimates, remains; although, significant correlations between terrestrial and lunar observations are beginning to emerge.
Document ID
19790013804
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Latham, G. V. (Texas Univ. Galveston, TX, United States)
Dorman, H. J. (Texas Univ. Galveston, TX, United States)
Horvath, P. (Texas Univ. Galveston, TX, United States)
Ibrahim, A. K. (Texas Univ. Galveston, TX, United States)
Koyama, J. (Texas Univ. Galveston, TX, United States)
Nakamura, Y. (Texas Univ. Galveston, TX, United States)
Date Acquired
September 3, 2013
Publication Date
March 1, 1979
Subject Category
Lunar And Planetary Exploration
Report/Patent Number
NASA-CR-160142
Accession Number
79N21975
Funding Number(s)
CONTRACT_GRANT: NAS9-14581
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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