California Geological Survey

Earthquake Response

Responsibilities and FunctionsJerry Treiman

Senior Engineering GeologistCalifornia Geological Survey

California Geological SurveyEarthquake Response

1. Provide information and support to CalEMA

2. Evaluate extent and severity of surface fault rupture

3. Evaluate extent and severity of ground failure

4. Collect Strong Motion Data

5. Monitor tsunami effects

California Geological SurveyEarthquake Response

1. Establish Clearinghouse identify hazards – document data• Facilitate overflights

• Facilitate access• Collect and share data• Help coordinate field efforts • Disseminate critical information to responders

and decision makers• [observe structural damage (with EERI)]

Clearinghouse does not direct or control activities

1994Northridge Earthquake

Clearinghouse

California Geological SurveyEarthquake Response

2. Map Fault Rupture for State APEFZ Program• Document breadth and complexity of faulting• Observe fault-related deformation• Assess adequacy of existing zones• Recommend zone revisions

courtesy T. Rockwell courtesy T. Rockwell photo by K. Clahan

California Geological SurveyEarthquake Response

3. Identify Ground Failure • Landslides, liquefaction & lateral spread • Be alert to imminent threats to facilities and infrastructure• Learn from observed failures• Goal is to be able to make better hazard maps

photo by H. Stenner photo by T. McCrink photo courtesy P. Irvine

photo by H. Stenner

1994

2010

20102010

California Geological SurveyEarthquake Response

4. Strong Motion Instrumentation Program• Manages a network of accelerographs throughout

the State (free field, hi-rise bldgs, dams, bridges)• Collaborates with CISN to produce Shake Map• Obtains records for buildings during earthquake• Rapid dissemination of data through CESMD • Data to help improve codes and design

California Geological SurveyEarthquake Response

5. Tsunami Response To evaluate adequacy of present maps and improve hazard assessment.

California Geological SurveySouthern San Andreas Earthquake Response

California Geological SurveySouthern San Andreas Earthquake Response

Coordination

USGS

SCEC

Others

California Geological SurveySouthern San Andreas Earthquake Response

CGS goals –Gather data with respect to the distribution and magnitude of rupture and ground failureIdentify imminent hazardsPass critical information to responders and decision makers.Maintain close contact with Clearinghouse and other sites to ensure critical issues are covered

California Geological SurveySouthern San Andreas Earthquake Response

Overflights and other means to assess scope of event Coordination of field efforts with others Multiple field “camps” - one won’t be enough Communication critical Coordinate efforts for efficiency and completeness Share information and timely observations Coordinate info with SCEC response site and others

Needs that we are concerned about -

California Geological SurveySouthern San Andreas Earthquake Response

Credit: Rob Graves (URS) Brad Aagaard & Ned Field, (USGS); Nitin Gupta

Lancaster

San Bernardino

Indio

California Geological SurveyEarthquake Response

Outstanding Issues: Pre-selection of field rendezvous sites to share information and resources Data communication and coordination Staffing needs to get the work done Aerial photography/remote imagery Data collection standards/consistency (forms; common datum) Maps/GIS needs

http://www.eqclearinghouse.org/CA/

California Geological SurveyEarthquake Response

Jerry TreimanSenior Engineering GeologistCalifornia Geological Survey