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handle: 10400.3/4490
ABSTRACT: Rotation of the Sun in the Galaxy, as well as a possible oscillation perpendicular to the galactic plane, are acceptable mechanisms for producing the main tectonic phenomena, if we assume along that orbit, the existence of changes in gravitation (or in the so-called gravitational «constant»). The oscillation, with a semi-period of 11 years, seems to produce the earthquake swarms of the Azores. The effect of the Earth's movement round the Sun, superimposed on that oscillation, could also be responsible for some pulsation of the magma chambers of Azorean volcanoes.
O movimento galáctico do Sol, juntamente com uma possível oscilação perpendicular ao plano galáctico constituem mecanismos suficientes para produzir os principais fenómenos tectónicos, se admitirmos que ao longo da órbita há variantes da gravitação (ou da correspondente «constante»). A oscilação com um semiperíodo de 11 anos parece produzir as crises sísmicas dos Açores. O efeito do movimento da Terra em torno do Sol, sobreposto àquela oscilação, pode também ser responsável pela pulsação de câmaras magmáticas dos vulcões açorianos.
Geotectónica, Relatividade Geral
Geotectónica, Relatividade Geral
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