Earthquake Hazards Program

U.S. Geological Survey
Open-File Report 2007-1367
version 1.0 [archive]

[archive] Data from Theodolite Measurements of Creep Rates on San Francisco Bay Region Faults, California: 1979-2007

By Forrest S. McFarland, James J. Lienkaemper, S. John Caskey, and Karen Grove


This old site is totally superseded by USGS Open-File Report 2009-1119 and is only here for historical value.

thumbnail of map of Bay Areathumbnail of map of Hayward-Fault area
Bay-Area arrays and Hayward-Fault arrays


Our purpose is to update with six additional years of data, our creep data archive on San Francisco Bay region active faults 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). Jon Galehouse of San Francisco State University (SFSU) and many student research assistants measured creep (aseismic slip) rates on these faults from 1979 until his retirement from the project in 2001. The creep measurement project, which was initiated by Galehouse, has continued through the Geosciences Department at SFSU from 2001-2006 under the direction of Co-P.I.’s Karen Grove and John Caskey (Grove and Caskey, 2005), and by Caskey since 2006. Forrest McFarland has managed most of the technical and logistical project operations as well as data processing and compilation since 2001. We plan to publish detailed analyses of these updated creep data in future publications.

We maintain a project web site ( that includes the following information: project description, project personnel, creep characteristics and measurement, map of creep measurement sites, creep measurement site information, and data plots for each measurement site. Our most current, annually updated results are therefore accessible to the scientific community and to the general public. Information about the project can currently be requested by the public by an email link ( found on our project website

Download the text of this report as a 14-page PDF file (of2007-1367.pdf; 1.5 MB).

The data for this report are available in Excel .xls format, ASCII .txt format, and as a PDF. Go to the data folder (data folder; 2.8 MB total).

For questions about this report, contact Jim Lienkaemper.

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