THEORIES OF PLATE TECTONICS AND CELESTIAL GEODYNAMICS
The conventional interpretation of the Theory of Plate Tectonics includes an aspect detailing what mechanisms drive plate motions. The principal drivers recognized, as of 1 Jan 2015, by the geophysics community are components of terrestrial convection: slab pull, ridge push, and basal traction on plates from coupled lateral elements of mantle circulation. This narrow, terrestrial perspective takes our planet out of its celestial context. A new overarching theory, Celestial Geodynamics, suggests a significant driving mechanism to plate tectonics, other than convection-related processes. Convection, alone, seems an insufficient driver, because in a closed global system all convection driven action-reaction should balance out over extended geologic time, leaving no net crustal motion with respect to the rotational axis. However, several studies back in the mid-to-late 1980s found significant and geometrically regular True Polar Wander. Further, True Polar Wander has been repeatedly confirmed since then. For such net movement to occur, it seems that driver(s) external to Earth must exist. Thus, the concept of geodynamic driving via lunisolar, gravitational interaction was conceived: a part of multiple, hypothetical effects deriving from the Theory of Celestial Geodynamics.
TECTONIC EFFECTS ON EARTH FROM LUNISOLAR, GRAVITATIONAL INTERACTION
While the rotational axis of Earth moves with respect to the surface, physically required and proportional migration of the equatorial bulge should drive seismicity in the lithosphere, as georadial adjustments are being made on the leading and trailing sides of the 'equatorial wave'. Additional spatial-statistical work (as yet unpublished) has supported this idea by showing that the average direction of polar drift for the last 120 years matches well the meridian great circle (MGC) of least dispersion with respect to global seismic energy for that same period. This relationship should follow from the geometrical fact that bulge migration along the surface will be fastest along a MGC that is aligned with the direction of polar drift. Further, the same MGC is aligned well with a component of net global movement of the crust with respect to the mantle, as represented by the hotspot reference frame. This matching suggests that global plate dynamics are driven, in part, by bulge migration, which may be driven by extraterrestrial gravitational interaction, because the globally exterior lithosphere is driven more than the globally interior mantle.
FUTURE GLOBAL TRENDS
An important trend concerning the above is that polar drift, which for the last 124 years has averaged ~15 cm/year, is relatively fast right now (~42 cm/year) and will get even faster. Our projections suggest ~52 cm/year by 2021. Further analysis of geodynamic cyclicity suggests that total global seismic energy at that time has the potential to be higher than it has been in four celestial-mechanically driven, 59-year geodynamic cycles (~236 years). The most hazardous period for large earthquakes and volcanic eruptions will be when maximum polar-drift jounce (second time-derivative of polar-drift acceleration) occurs, which should be about 2021 (+/- 3 years). Please remember that this new work is tentative, and exercise caution in its acceptance and interpretation.