Physics
Scientific paper
Feb 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pepi...42..129m&link_type=abstract
Physics of the Earth and Planetary Interiors (ISSN 0031-9201), vol. 42, Feb. 28, 1986, p. 129-134.
Physics
37
Earth Core, Earth Gravitation, Gravimetry, Oscillations, Superconductors, Brunt-Vaisala Frequency, Earthquakes, Power Spectra
Scientific paper
As stated by Crossley and Rochester, the discovery and identification of even a few undertone periods would provide valuable gross constraints on the stability profile, and hence, the thermal regime of the core. Three years of continuous measurements of gravity variations with a superconducting gravimeter at Brussels offer a possibility to detect such oscillations in that part of the spectrum where tidal contibutions can be eliminated. Spectral peaks of 10-15 ngal amplitude, detected around a period of 13.9 h, were enhanced immediately after the two deep earthquakes of magnitude 7.2 which occurred during the observation interval.
Ducarme Bernard
Melchior Peter
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