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Variations in creep rate along the Hayward Fault, California, interpreted as changes in depth of creep

Geophysical Research Letters

By:
, , and
DOI: 10.1029/2001GL012979

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Abstract

Variations ill surface creep rate along the Hayward fault are modeled as changes in locking depth using 3D boundary elements. Model creep is driven by screw dislocations at 12 km depth under the Hayward and other regional faults. Inferred depth to locking varies along strike from 4-12 km. (12 km implies no locking.) Our models require locked patches under the central Hayward fault, consistent with a M6.8 earthquake in 1868, but the geometry and extent of locking under the north and south ends depend critically on assumptions regarding continuity and creep behavior of the fault at its ends. For the northern onshore part of the fault, our models contain 1.4-1.7 times more stored moment than the model of Bu??rgmann et al. [2000]; 45-57% of this stored moment resides in creeping areas. It is important for seismic hazard estimation to know how much of this moment is released coseismically or as aseismic afterslip.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Variations in creep rate along the Hayward Fault, California, interpreted as changes in depth of creep
Series title:
Geophysical Research Letters
DOI:
10.1029/2001GL012979
Volume
28
Issue:
11
Year Published:
2001
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysical Research Letters
First page:
2269
Last page:
2272
Number of Pages:
4