thumbnail

The dependence of acoustic properties of a crack on the resonance mode and geometry

Geophysical Research Letters

By:
and
DOI: 10.1029/2001GL013025

Links

Abstract

We examine the dependence of the acoustic properties of a crack containing magmatic or hydrothermal fluids on the resonance mode and geometry to quantify the source properties of long-period (LP) events observed in volcanic areas. Our results, based on spectral analyses of synthetic waveforms generated with a fluid-driven crack model, indicate that the basic features of the dimensionless frequency (??) and quality factor (Qr) for a crack containing various types of fluids are not strongly affected by the choice of mode, although the actual ranges of Q?? and ?? both depend on the mode. The dimensionless complex frequency systematically varies with changes in the crack geometry, showing increases in both Qr and ?? as the crack length to aperture ratio decreases. The present results may be useful for the interpretation of spatial and temporal variations in the observed complex frequencies of LP events.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The dependence of acoustic properties of a crack on the resonance mode and geometry
Series title:
Geophysical Research Letters
DOI:
10.1029/2001GL013025
Volume
28
Issue:
17
Year Published:
2001
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysical Research Letters
First page:
3325
Last page:
3328