On the use of volumetric strain meters to infer additional characteristics of short-period seismic radiation

Bulletin of the Seismological Society of America
By: , and 

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Abstract

Volumetric strain meters (Sacks-Evertson design) are installed at 15 sites along the San Andreas fault system, to monitor long-term strain changes for earthquake prediction. Deployment of portable broadband, high-resolution digital recorders (GEOS) at several of the sites extends the detection band for volumetric strain to periods shorter than 5 ?? 10-2 sec and permits the simultaneous observation of seismic radiation fields using conventional short-period pendulum seismometers. Recordings of local and regional earthquakes indicate that dilatometers respond to P energy but not direct shear energy and that straingrams can be used to resolve superimposed reflect P and S waves for inference of wave characteristics not permitted by either sensor alone. Simultaneous measurements of incident P- and S-wave amplitudes are used to introduce a technique for single-station estimates of wave field inhomogeneity, free-surface reflection coefficients and local material P velocity. -from Authors
Publication type Article
Publication Subtype Journal Article
Title On the use of volumetric strain meters to infer additional characteristics of short-period seismic radiation
Series title Bulletin of the Seismological Society of America
DOI 10.1785/BSSA0790041006
Volume 79
Issue 4
Year Published 1989
Language English
Publisher Seismological Society of America
Description 18 p.
First page 1006
Last page 1023
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