Suggested citation and version history for: Bakun, William H., 2008, revised 2009, Historical seismicity in the south San Francisco Bay region: U.S. Geological Survey, Open-File Report 2008-1151, v. 1.1, 37 p. [http://pubs.usgs.gov/of/2008/1151/]. Version 1.1 April 2, 2009 longitude in Table 1 corrected from 122.8 to 121.8 W February 10, 2009 For 4 July 1861, the number of sites was 13 rather than 15. This increased the M at preferred location from 5.5 to 5.9, and the 95% conf. range from 5.1-5.8 to 5.5-6.2. The map shown on Figure 2 on page 13 has been changed to reflect this increase. The .xls table was revised to match the PDF. Version 1.0 June 24, 2008 Corrected typo on title page, added a greater-than-or-equal sign to equation 4 June 12, 2008 Added Jennings reference and edited other references; fixed font issues; added to caption on figure 25 May 15, 2008 Initial release online at http://pubs.usgs.gov/of/2008/1151/