Data from Theodolite Measurements of Creep Rates on San Francisco Bay Region Faults, California

Open-File Report 2009-1119
By: , and 



Our purpose is to annually update 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) and updated in Lienkaemper and others (2012). Lienkaemper and others (2014) provide a new overview and analysis of fault creep along all sections of the northern San Andreas Fault system, from which they estimate by how much fault creep reduces the seismic hazard for each fault section.

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, continued through the Geosciences Department at SFSU from 2001-2006 under the direction of Karen Grove and John Caskey (Grove and Caskey, 2005) and since 2006 under 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). From 2009 onward, we have released the raw data annually using this report (OF2009-1119) as a permanent publication link, while publishing more detailed analyses of these data in the scientific literature, such as Lienkaemper and others (2014).

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 links to 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 Web site.

Suggested Citation

McFarland, F.S., Lienkaemper, J.J., and Caskey, S.J., 2016, Data from theodolite measurements of creep rates on San Francisco Bay region faults, California (ver. 1.8, March 2016): U.S. Geological Survey Open-File Report 2009–1119, 21 p. and data files,

ISSN: 2331-1258 (online)

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Data from theodolite measurements of creep rates on San Francisco Bay region faults, California
Series title Open-File Report
Series number 2009-1119
DOI 10.3133/ofr20091119
Edition Version 1.0: July 8, 2009; Version 1.1: April 19, 2010; Version 1.2: May 5, 2011; Version 1.3: April 19, 2012; Version 1.4: March 20, 2013; Version 1.5: February 3, 2014; Version 1.6: March 16, 2015; Version 1.8: March 29, 2016
Year Published 2009
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Earthquake Hazards Program, Earthquake Science Center
Description Report: 21 p.; Data Files
Time Range Start 1979-01-01
Time Range End 2012-12-31
Country United States
State California
Other Geospatial San Francisco Bay
Online Only (Y/N) Y
Additional Online Files (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details