Sep 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.4524a&link_type=abstract
Journal of Geophysical Research, vol. 82, Sept. 30, 1977, p. 4524-4546.
Physics
25
Mars (Planet), Planetary Structure, Planetology, Seismology, Background Noise, Noise Reduction, Planetary Crusts, Planetary Mantles, Viking Lander Spacecraft, Wind Effects
Scientific paper
High-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.
Anderson David L.
Dainty Anton M.
Duennebier Frederick K.
Knight Tony C. D.
Kovach Robert L.
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