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Seismology on MarsHigh-quality data (uncontaminated by lander or wind noise) obtained with a three-axis short-period seismometer operating on Mars in the Utopia Planitia region are analyzed. No large events have been detected during the first five months of operation covered in the present paper. This indicates that Mars is less seismically active than the earth. Winds, and therefore a seismic background, began to intrude into the nighttime hours, starting with sol 119 (sol is a Martian day). The seismic background correlates well with wind velocity, and is proportional to the square of the wind velocity, as is appropriate for turbulent flow. A local seismic event of a magnitude of 3 and a distance of 110 km was detected on sol 80. It is interpreted as a natural seismic event.
Document ID
19780027531
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Anderson, D. L.
(California Inst. of Tech. Pasadena, CA, United States)
Miller, W. F.
(California Institute of Technology Pasadena, Calif., United States)
Latham, G. V.
(California Inst. of Tech. Pasadena, CA, United States)
Nakamura, Y.
(Texas, University Galveston, Tex., United States)
Toksoz, M. N.
(California Inst. of Tech. Pasadena, CA, United States)
Dainty, A. M.
(MIT Cambridge, Mass., United States)
Duennebier, F. K.
(California Inst. of Tech. Pasadena, CA, United States)
Lazarewicz, A. R.
(Hawaii, University Honolulu, Hawaii, United States)
Kovach, R. L.
(Stanford University Palo Alto, Calif., United States)
Knight, T. C. D.
(Martin Marietta Aerospace Denver, Colo., United States)
Date Acquired
August 9, 2013
Publication Date
September 30, 1977
Publication Information
Publication: Journal of Geophysical Research
Volume: 82
Subject Category
Lunar And Planetary Exploration
Accession Number
78A11440
Funding Number(s)
CONTRACT_GRANT: NAS1-9703
Distribution Limits
Public
Copyright
Other

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