Crustal parameters estimated from P-waves of earthquakes recorded at a small array
Pure and Applied Geophysics PAGEOPH
By: J.N. Murdock and J.A. Steppe
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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.
Suggested Citation
Murdock, J., Steppe, J., 1980, Crustal parameters estimated from P-waves of earthquakes recorded at a small array: Pure and Applied Geophysics PAGEOPH, v. 118, no. 2, p. 1179-1190, https://doi.org/10.1007/BF01593058.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Crustal parameters estimated from P-waves of earthquakes recorded at a small array |
| Series title | Pure and Applied Geophysics PAGEOPH |
| DOI | 10.1007/BF01593058 |
| Volume | 118 |
| Issue | 2 |
| Year Published | 1980 |
| Language | English |
| Publisher location | Birkha??user-Verlag |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Pure and Applied Geophysics PAGEOPH |
| First page | 1179 |
| Last page | 1190 |