Computer Science
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.292...11s&link_type=abstract
Nature, vol. 292, July 2, 1981, p. 11, 12.
Computer Science
1
Foci, Moonquakes, Periodic Variations, Plates (Tectonics), Seismic Waves, Tides, Depth, Earthquakes, Temperature Distribution, Thermal Energy, Moon, Moonquakes, Comparisons, Distribution, Characteristics, Stress, Properties, Depth, Tectonics, Seismicity, Energy, Thermal Properties, Periodicity, Tidal Effects, Hypotheses, Lithosphere, Magnitude
Scientific paper
The dynamics of moonquakes are analyzed and compared with earthquake data. Results show that definite foci, seismic waves and radiation of energy are found in both bodies, the distribution of lunar and terrestrial shocks, however, differ in space and time. Earthquakes do not demonstrate clear temporal patterns, and the epicenters lie along narrow bands, coinciding with major crustal features with foci at depths of 0-700 km, while moonquakes have a periodicity of 27 days for deep quakes with foci in depths of 700-1100 km, and five per year for shallow quakes (with no periodicity) in depths of approximately 200 km. Conclusions based on the Apollo Passive Seismic Net data show that while the thermal energy available in both bodies is almost equal, the difference in size leads to differences in the distribution of temperature-depth distribution and consequently to different tectonic regimes. Cyclic events related to moonquakes are controlled by tidal forces whereas heat is seen as the chief influence on terrestrial seismicity.
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