Late Holocene slip rate of the San Andreas Fault and its accommodation by creep and moderate-magnitude earthquakes at Parkfield, California

Investigation of a right-laterally offset channel at the Miller's Field paleoseismic site yields a late Holocene slip rate of 26.2 +6.4/-4.3 mm/yr (1σ) for the main trace of the San Andreas fault at Parkfield, California. This is the first well-documented geologic slip rate between the Carrizo...

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Bibliographic Details
Published in:Geology (Boulder) 2011-03, Vol.39 (3), p.243-246
Main Authors: Toké, Nathan A, Arrowsmith, J. Ramón, Rymer, Michael J, Landgraf, Angela, Haddad, David E, Busch, Melanie M, Coyan, Joshua A, Hannah, Alexander
Format: Article
Language:English
Subjects:
accommodation zones
active faults
California
Cenozoic
clastic sediments
clay
creep
Creep (materials)
Deformation
Earthquakes
fabric
Fabrics
faults
field studies
Geology
Holocene
lateral faults
Measurement
Monterey County California
Northwest
paleoseismicity
Parkfield California
Parkfield earthquakes
Quaternary
right-lateral faults
San Andreas Fault
sediments
Seismic phenomena
Seismology
Slip
slip rates
Stratigraphy
Structural geology
trenching
United States
upper Holocene
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Summary:Investigation of a right-laterally offset channel at the Miller's Field paleoseismic site yields a late Holocene slip rate of 26.2 +6.4/-4.3 mm/yr (1σ) for the main trace of the San Andreas fault at Parkfield, California. This is the first well-documented geologic slip rate between the Carrizo and creeping sections of the San Andreas fault. This rate is lower than Holocene measurements along the Carrizo Plain and rates implied by far-field geodetic measurements (∼35 mm/yr). However, the rate is consistent with historical slip rates, measured to the northwest, along the creeping section of the San Andreas fault (
ISSN:0091-7613
1943-2682
DOI:10.1130/G31498.1