Gravity and the earthquake mechanism

Details Gravity and the earthquake mechanism Gravity and the earthquake mechanism

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pepi...16..240v&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 16, Issue 3, p. 240-246.

Physics

Scientific paper

Earthquake sources exhibiting anelastic volume changes are studied in a gravitating earth. The excitation of seismic displacement fields by such sources cannot be fully described by a moment tensor. The effect of gravity manifests itself through the action of a buoyancy force at the source, which is compensated by a continuous distribution of volume forces through the earth. An inversion scheme which does not take into account these gravitational forces may lead to a pseudo-precursive action in the source and to an erroneous source characterisation.

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