(Submitted on 18 Dec 2006 (v1), last revised 9 Apr 2008 (this version, v4))
Variance spectral analysis of superconducting gravimeter (SG) decadal data (noise inclusive) is presented suggesting that the Earth tectonogenesis is based on magnification of the mass (mainly the mantle) mechanical resonance, in addition to or instead of previously hypothesized causes. Here the use of raw (gapped and unaltered) data is regarded as the criterion for a physical result validity, so data were not altered in any way. Then analogously to the atmospheric tidal forcing of global high frequency free oscillation, I propose that the Moon synodically recurring pull could likewise drive the long-periodic (12 to 120 minutes) oscillation of the Earth. To demonstrate this, I show that the daily magnitudes of mass (gravity) oscillation, as a relative measure of the non-stationary Earth kinetic energy, get synodically periodic while correlating up to 0.97 with seismic energies on the day of shallow and 3 days before deep earthquakes. The forced oscillator equations for the mantle usual viscosity and the Earth springtide and grave mode periods successfully model an identical 3 days phase. Finally, whereas reports on gravest earthquakes (of around M9.5) put the maximum coseismic displacement at around 10 m, the same equations predict the maximum displacement as 9.8 m, too. Hence, the same mechanism that causes bridges to collapse under the soldiers step marching could be making the lithosphere fail under the springtide induced magnification of mantle resonance resulting in strong earthquakes of unspecified type. If this assertion is correct, then many if not most large earthquakes could be spatially and temporally predictable.
| Comments: | Published version, 14 pages, 6 figures |
| Subjects: | Geophysics (physics.geo-ph); Classical Physics (physics.class-ph); Data Analysis, Statistics and Probability (physics.data-an) |
| Journal reference: | Geodinamica Acta (European J of Geodynamics) 20, 6, 369-383 (2007) |
| DOI: | 10.3166/ga.20.369-383 |
| Cite as: | arXiv:physics/0612177v4 [physics.geo-ph] |
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