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Resonance of a fluid-driven crack: radiation properties and implications for the source of long-period events and harmonic tremor.

Journal of Geophysical Research

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Abstract

A dynamic source model is presented, in which a 3-D crack containing a viscous compressible fluid is excited into resonance by an impulsive pressure transient applied over a small area DELTA S of the crack surface. The crack excitation depends critically on two dimensionless parameters called the crack stiffness and viscous damping loss. According to the model, the long-period event and harmonic tremor share the same source but differ in the boundary conditions for fluid flow and in the triggering mechanism setting up the resonance of the source, the former being viewed as the impulse response of the tremor generating system and the later representing the excitation due to more complex forcing functions.-from Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Resonance of a fluid-driven crack: radiation properties and implications for the source of long-period events and harmonic tremor.
Series title:
Journal of Geophysical Research
Volume
93
Issue:
B5
Year Published:
1988
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Geophysical Research
First page:
4375
Last page:
4400