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Dislocation modeling of creep-related tilt changes

Tectonophysics

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Abstract

Tilt changes associated with 1-5 mm of fault creep have been detected at several different locations on the San Andreas fault on tiltmeters within 500 m of the creep observation point. The creep-related tilts have amplitudes of 0??.5 ??rad and durations comparable to the creep events. No changes $ ??10-2 ??rad have been observed on tiltmeters at distances $ ??1 km from the fault at the time of the creep events. Dislocation models capable of replicating the creep-related tilt events have been constructed to examine the relationship of the model parameters to details of the tilt waveforms. The tilt time histories and bounded assumptions of the source-station configurations, and the displacement time history, can be used to infer the type and amount of displacement, the propagation direction and depth of the slip zone. The shallow depth and finite size of the slip zone indicated by these models constrasts with the horizontal extent. ?? 1979.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Dislocation modeling of creep-related tilt changes
Series title:
Tectonophysics
Volume
52
Issue:
1-4
Year Published:
1979
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Tectonophysics
First page:
520