Creep Response of the Hayward Fault to Stress Changes Caused by the Loma Prieta Earthquake

In 1996, an 18-millimeter creep event, the largest ever observed on the Hayward fault, occurred between surveys 63 days apart. This event marked the end of a period of severely reduced creep on the southern part of the fault that began after the 1989 Loma Prieta, California, earthquake. The reductio...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1997-06, Vol.276 (5321), p.2014-2016
Main Authors: Lienkaemper, James J., Galehouse, Jon S., Simpson, Robert W.
Format: Article
Language:English
Subjects:
Drought
Earth sciences
Earth, ocean, space
Earthquakes
Earthquakes, seismology
Exact sciences and technology
Fault lines
Geology
Internal geophysics
Natural cycles
Periodicity
Plate tectonics
Seismology
Shear stress
Statics
Stress fields
Studies
Tectonics. Structural geology. Plate tectonics
Weighted averages
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Summary:In 1996, an 18-millimeter creep event, the largest ever observed on the Hayward fault, occurred between surveys 63 days apart. This event marked the end of a period of severely reduced creep on the southern part of the fault that began after the 1989 Loma Prieta, California, earthquake. The reduction in creep was consistent with elastic models for earthquake-induced static stress changes on the Hayward fault. These data suggest that creep observations can indicate regional stress changes of about 1 bar or less.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.276.5321.2014