Variation of P-wave velocity before the Bear Valley, California, earthquake of 24 February 1972
Science
By: R. Robinson, R. L. Wesson, and W.L. Ellsworth
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Abstract
Residuals for P-wave traveltimes at a seismograph station near Bear Valley, California, for small, precisely located local earthquakes at distances of 20 to 70 kilometers show a sharp increase of nearly 0.3 second about 2 months before a magnitude 5.0 earthquake that occurred within a few kilometers of the station. This indicates that velocity changes observed elsewhere premonitory to earthquakes, possibly related to dilatancy, occur along the central section of the San Andreas fault system.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Variation of P-wave velocity before the Bear Valley, California, earthquake of 24 February 1972 |
| Series title | Science |
| Volume | 184 |
| Issue | 4143 |
| Year Published | 1974 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Science |
| First page | 1281 |
| Last page | 1283 |