Geodetic estimate of coseismic slip during the 1989 Loma Prieta, California, Earthquake
Geophysical Research Letters
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Abstract
Offsets in the relative positions of geodetic stations resulting from the Loma Prieta earthquake can be explained with a dislocation model that includes buried oblique slip on a rupture surface extending 37 km along the strike of the San Andreas fault, dipping 70° to the SW, and extending from a depth of about 5 to 17.5 km. Assuming uniform slip on a rectangular surface, the mean values for a range of reasonable fault geometries are 1.6 ± 0.3 m right‐lateral strike slip and 1.2 ±0.3 m reverse slip. Slip on an adjacent extension of the rupture to the southeast, recorded in the aftershock sequence, is not well constrained by the geodetic data. The geodetic data clearly preclude rupture extending near the surface.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Geodetic estimate of coseismic slip during the 1989 Loma Prieta, California, Earthquake |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/GL017i009p01437 |
| Volume | 17 |
| Issue | 9 |
| Year Published | 1990 |
| Language | English |
| Publisher | American Geophysical Union |
| Contributing office(s) | Earthquake Science Center |
| Description | 4 p. |
| First page | 1437 |
| Last page | 1440 |
| Country | United States |
| State | California |
| Other Geospatial | San Francisco Bay area |
| Google Analytic Metrics | Metrics page |