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Slip-parallel seismic lineations on the Northern Hayward Fault, California

Geophysical Research Letters

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Abstract

A high-resolution relative earthquake location procedure is used to image the fine-scale seismicity structure of the northern Hayward fault, California. The seismicity defines a narrow, near-vertical fault zone containing horizontal alignments of hypocenters extending along the fault zone. The lineations persist over the 15-year observation interval, implying the localization of conditions on the fault where brittle failure conditions are met. The horizontal orientation of the lineations parallels the slip direction of the fault, suggesting that they are the result of the smearing of frictionally weak material along the fault plane over thousands of years.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Slip-parallel seismic lineations on the Northern Hayward Fault, California
Series title:
Geophysical Research Letters
Volume
26
Issue:
23
Year Published:
1999
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
3525
Last page:
3528
Number of Pages:
4