Charles N. Alpers, Ph.D. U.S. Geological Survey California Water Science Center Placer Hall
California Geological Survey
description
Transcript of California Geological Survey
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