thumbnail

Rupture models for the A.D. 900-930 Seattle fault earthquake from uplifted shorelines

Geology

By:
, , and
DOI: 10.1130/G22173.1

Links

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.

Additional Publication Details

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
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geology
First page:
585
Last page:
588