| 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 |
| Genre: | Article |
| ProdID: | 70014954 |
| Citation Author: | Borcherdt, R. D.; Johnston, M. J. S.; Glassmoyer, G. |
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| Citation End Page: | 1023 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Bulletin - Seismological Society of America |
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| Citation Number Of Pages: | 18 |
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| Citation Search Results Text: | On the use of volumetric strain meters to infer additional characteristics of short-period seismic radiation; 1989; Article; Journal; Bulletin - Seismological Society of America; Borcherdt, R. D.; Johnston, M. J. S.; Glassmoyer, G. |
| Citation Start Page: | 1006 |
| Citation Volume: | 79 |
| Citation Year: | 1989 |
| Type: | citation/reference |
| Text: | On the use of volumetric strain meters to infer additional characteristics of short-period seismic radiation; 1989; Article; Journal; Bulletin - Seismological Society of America; Borcherdt, R. D.; Johnston, M. J. S.; Glassmoyer, G. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1989 00:00 -0600 |
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