Rupture models for the A.D. 900-930 Seattle fault earthquake from uplifted shorelines
Geology
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Abstract
A major earthquake on the Seattle fault, Washington, ca. A.D. 900-930 was first inferred from uplifted shorelines and tsunami deposits. Despite follow-up geophysical and geological investigations, the rupture parameters of the earthquake and the geometry of the fault are uncertain. Here we estimate the fault geometry, slip direction, and magnitude of the earthquake by modeling shoreline elevation change. The best fitting model geometry is a reverse fault with a shallow roof ramp consisting of at least two back thrusts. The best fitting rupture is a SW-NE ohlique reverse slip with horizontal shortening of 15 m, rupture depth of 12.5 km, and magnitude Mw = 7.5. ?? 2006 Geological Society of America.
Suggested Citation
ten Brink, U., Song, J., Bucknam, R., 2006, Rupture models for the A.D. 900-930 Seattle fault earthquake from uplifted shorelines: Geology, v. 34, no. 7, p. 585-588, https://doi.org/10.1130/G22173.1.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Rupture models for the A.D. 900-930 Seattle fault earthquake from uplifted shorelines |
| Series title | Geology |
| DOI | 10.1130/G22173.1 |
| Volume | 34 |
| Issue | 7 |
| Year Published | 2006 |
| Language | English |
| Contributing office(s) | Woods Hole Coastal and Marine Science Center |
| Description | 4 p. |
| Larger Work Title | Geology |
| First page | 585 |
| Last page | 588 |
| Country | United States |
| State | Washington |
| Other Geospatial | Puget Sound |