NEHRP Clearinghouse

Title
Data from Theodolite Measurements of Creep Rates on San Francisco Bay Region Faults, California, 1979-2009.
File
PB2009115920.pdf
Author(s)
McFarland, F. S.; Lienkaemper, J. J.; Caskey, S. J.
Source
January 2009, 17 p.
Identifying Number(s)
USGS/OFR-2009-1119
Abstract
Our purpose is to update our creep-data archive on San Francisco Bay region active faults with two additional years of data for use by the scientific research community. Earlier data (1979-2001) were reported in Galehouse (2002) and were analyzed and described in detail in a summary report (Galehouse and Lienkaemper, 2003). A complete analysis of our earlier results obtained on the Hayward Fault was presented in Lienkaemper, Galehouse and Simpson (2001). From 1979 until his retirement from the project in 2001, Jon Galehouse of San Francisco State University (SFSU) and many student research assistants measured creep (aseismic slip) rates on these faults. The creep measurement project, which was initiated by Galehouse, has continued through the Geosciences Department at SFSU from 2001-2006 under the direction of Karen Grove and John Caskey (Grove and Caskey, 2005) and by Caskey since 2006 (Caskey, 2007). Forrest McFarland has managed most of the technical and logistical project operations, as well as data processing and compilation since 2001. Data from 2001-2007 are found in McFarland and others (2007). Henceforth, we plan to release these data annually and publish detailed analyses of the data in future publications.
Keywords
Loma Prieta earthquake; Creep rates; Data collection; Earthquake faults; California; Hayward faults; Theodolite; Measurements; San Francisco Bay region; Tables (Data); Aseismic slip