| Abstract: | The P-arrival times of local and regional earthquakes that are outside of a small network of seismometers can be used to interpret crustal parameters beneath the network by employing the time-term technique. Even when the estimate of the refractor velocity is poorly determined, useful estimates of the station time-terms can be made. The method is applied to a 20 km diameter network of eight seismic stations which was operated near Castaic, California, during the winter of 1972-73. The stations were located in sedimentary basins. Beneath the network, the sedimentary rocks of the basins are known to range from 1 to more than 4 km in thickness. Relative time-terms are estimated from P-waves assumed to be propagated by a refractor in the mid-crust, and again from P-waves propagated by a refractor in the upper basement. For the range of velocities reported by others, the two sets of time-terms are very similar. They suggest that both refractors dip to the southwest, and the geology also indicates that the basement dips in this direction. In addition, the P-wave velocity estimated for the refractor of mid-crustal depths, roughly 6.7 km/sec, agrees with values reported by others. Thus, even in this region of complicated geologic structure, the method appears to give realistic results. ?? 1980 Birkha??user Verlag. |
| Genre: | Article |
| ProdID: | 70012597 |
| Citation Author: | Murdock, J. N.; Steppe, J. A. |
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| Citation End Page: | 1190 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Pure and Applied Geophysics PAGEOPH |
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| Citation Number Of Pages: | 12 |
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| Citation Search Results Text: | Crustal parameters estimated from P-waves of earthquakes recorded at a small array; 1980; Article; Journal; Pure and Applied Geophysics PAGEOPH; Murdock, J. N.; Steppe, J. A. |
| Citation Start Page: | 1179 |
| Citation Volume: | 118 |
| Citation Year: | 1980 |
| Type: | citation/reference |
| Text: | Crustal parameters estimated from P-waves of earthquakes recorded at a small array; 1980; Article; Journal; Pure and Applied Geophysics PAGEOPH; Murdock, J. N.; Steppe, J. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1007/BF01593058 |
| Date Other: | Tue, 1 Jan 1980 00:00 -0600 |
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