Leighton Consulting has compiled a list of interesting geotechnical links. 

http://www.scecdc.scec.org/recenteqs
Maps of recent earthquake activity in California.

http://www.scecdc.scec.org/faults/faultmap.html
Maps of active faults in Southern California

http://www.scecdc.scec.org/faults/lafault.html
Map of active faults in the Los Angeles Basin

http://www.scecdc.scec.org/eqcountry.html
Summary of the book, "Putting Down Roots in Earthquake Country"

http://earthquake.usgs.gov/regional/sca
Pasadena office of the US Geological Survey

http://www.geology.ca.gov
Search for California registered Geologists and Geophysicists

http://www.dsa.dgs.ca.gov/inspector/default.htm
Search for School Construction Inspectors

http://www.dsa.dgs.ca.gov/labs/default.htm
Search for California DSA-accepted laboratories, including Leighton Consulting, Inc.

http://www.dtsc.ca.gov/rea
Search for California Registered Environmental Assessors such as Leighton Consulting, Inc.

http://www.insidetract.com
Search for Residential Tract Codes

http://www.eeri.org
Earthquake Engineering Research Institute

http://www.geoscapesphotography.com
Geologic and natural history landscape photography