Abstract
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.
Original language | English |
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Pages (from-to) | 240-246 |
Number of pages | 7 |
Journal | Physics of the Earth and Planetary Interiors |
Volume | 16 |
Issue number | 3 |
DOIs | |
Publication status | Published - Apr 1978 |