Variations in regional traveltimes
Crustal Studies Technical Letter
16
In cooperation with the Defense Advanced Research Projects Agency
By: J. H. Healy
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Abstract
Precise epicentral location of a seismic event is made difficult by variations in regional traveltimes. A discussion is presented on delays to be expected in the various segments of a generalized travel path of seismic waves. Traveltime variations caused by changes in crustal structure and velocity introduce a major part of the uncertainty in traveltime at both the seismic source and receiver. Consideration of geologic factors that tend to be related to crustal thickness and mantle velocity may permit an estimate of the amount of delay introduced at the source. Delay at the seismic receiving stations can be determined and corrected for by a study of crustal thickness and a calibration of the velocity structure under the stations.
Suggested Citation
Healy, J.H., 1964, Variations in regional traveltimes: Crustal Studies Technical Letter 16, v, 20 p., https://doi.org/10.3133/70039540.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Unnumbered Series |
| Title | Variations in regional traveltimes |
| Series title | Crustal Studies Technical Letter |
| Series number | 16 |
| DOI | 10.3133/70039540 |
| Year Published | 1964 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Denver, CO |
| Contributing office(s) | Earthquake Science Center |
| Description | v, 20 p. |
| Online Only (Y/N) | Y |