2006/12/31 by Mensur Omerbashich, M. Omerbashich · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #Displacement (psychology) #Earthquake Detection and Analysis #Forcing (mathematics) #Geophysics and Gravity Measurements #Gravimeter #High-pressure geophysics and materials #Lithosphere #Mantle (geology) #Oscillation (cell signaling) #Resonance (particle physics) #Tectonics #astro-ph.EP #physics.class-ph #physics.data-an #physics.geo-ph
paper · pdf · doi:10.3166/ga.20.369-383
published as Geodin.Acta 20:369-383,2007 · Published version, 14 pages, 6 figures
openalex publication_date 2007/12/01 · arxiv created 2008/04/09 · arxiv updated 2011/09/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Variance-spectral analysis of superconducting gravimeter (SG) decadal data (noise inclusive) is presented suggesting that the Earth tectonogenesis is based on magnification of 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's 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's synodically recurring pull could likewise drive the long-periodic (12-120 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's 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's usual viscosity and the Earth springtide and grave mode periods successfully model an identical 3-days phase. Finally, whereas reports on gravest earthquakes (of ~M9.5) put the maximum co-seismic displacement at ~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's resonance resulting in strong earthquakes of unspecified type (most of some 400 earthquakes that affected the SG in 1990-ies were strike-slip and thrust). If this assertion is correct, then many if not most large earthquakes could be predictable – spatially and temporally – by monitoring the tidal v. grave mode oscillation periodicities of separate mass bodies in the upper mantle and in the crust.