SLO Geology Guidelines

Landslide from San Simeon Earthquake

Liquefaction Damage in Oceano

These guidelines provide applicants and their geologic consultants with an overview of the information needed for engineering geology reports. 

San Simeon Earthquake Information

A large earthquake of magnitude 6.5 occured on the Central Coast of California at 11:15:56 (Pacific Standard Time) Monday, December 22, 2003.

EERI Special Earthquake Report (March 2004): Preliminary Observations on the December 22, 2003 San Simeon Earthquake

Additional Information is available from the U.S. Geological Survey Website and The Earthquake Engineering Research Institute

Oceano Liquefaction Information

Recent studies by the U.S. Geological Survey (USGS) have confirmed liquefiable soils in the Oceano area. Learn more here:

USGS report on Liquefaction-Induced Lateral Spreading in Oceano, California, during the 2003 San Simeon Earthquake

Penetration data from the 37 USGS SCPT soundings 

Liquefaction Information

Liquefaction: What it is and what to do about it

California Geological Special Publication 117: Guidelines for Evaluation and Mitigating Seismic Hazards in California

Recommended Procedures for Implementation of California Geological Special Publication 117: Guidelines for Analyzing and Mitigating Liquefaction Hazards in California 

Coastal Geology Information

The links below offer information about coastal geology:

Establishing Development Setbacks from Coastal Bluffs

Questions and Answers on El Niño, California Coastal Commission (includes preparedness checklists for shoreline property, slope protection & preparedness, and general property preparedness), 1997

Landslide Information

Landslide Hazards

Recommended Procedures for Implementation of DMG Special Publication 117: Guidelines for Analyzing and Mitigating Landslide Hazards in California

Fault Rupture Information

Alquist-Priolo Earthquake Fault Zones

Fault Rupture Hazard Zones in California