SOUTHERN CALIFORNIA EARTHQUAKE CENTER Southern California A Natural

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SOUTHERN CALIFORNIA EARTHQUAKE CENTER Southern California: A Natural Laboratory for Earthquake Science SCEC annual

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Southern California: A Natural Laboratory for Earthquake Science SCEC annual meeting, 2000

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Motivations • • Economic Geologic Seismic Historic Knowledgeable and interested

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Motivations • • Economic Geologic Seismic Historic Knowledgeable and interested public & Media Data availability Problem definition Export of know-how • The beach

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Geologic • Complex Plate Boundary deformation zone on land •

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Geologic • Complex Plate Boundary deformation zone on land • Continental breakup • Varied tectonic regimes, major geologic transitions • Good geologic exposure, well mapped • Numerous sedimentary basins • All types of faulting, including mature fault zones (SAF) and immature ones

SOUTHERN CALIFORNIA EARTHQUAKE CENTER We have faults

SOUTHERN CALIFORNIA EARTHQUAKE CENTER We have faults

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Seismic • Region of active seismicity (300+ active faults mapped)

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Seismic • Region of active seismicity (300+ active faults mapped) • Good instrumental coverage • Good history (450, 000 event catalog, 65 year coverage) • Good paleoseismic record • Numerous well mapped surface breaking events • 30, 000 well-constrained focal mechanisms • High quality digital data • Good access (data centers)

SOUTHERN CALIFORNIA EARTHQUAKE CENTER We have earthquakes

SOUTHERN CALIFORNIA EARTHQUAKE CENTER We have earthquakes

SOUTHERN CALIFORNIA EARTHQUAKE CENTER We have data • • • Seismic (include Strong Motions)

SOUTHERN CALIFORNIA EARTHQUAKE CENTER We have data • • • Seismic (include Strong Motions) Geodetic (GPS) Geologic (177 trenches so far) In. SAR Strain, lidar, remote sensing, etc. Socio-economic

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Economic Motivation • 20 million people • 7 th economy

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Economic Motivation • 20 million people • 7 th economy in the world • Major harbors, airports, freeways, lifelines, etc • Major heavy and light industry • Variety of building types • More than hazards…. there is Risk

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Earthquake Risk in Southern California 20 Million people + 7

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Earthquake Risk in Southern California 20 Million people + 7 th largest economy + Active plate boundary + Over 300 active faults = _______________ Almost half the national earthquake risk, with 25% in Los Angeles County alone. . .

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Larger Earthquakes 1932– 1997

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Larger Earthquakes 1932– 1997

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Does this Natural laboratory have the right size? • Outer

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Does this Natural laboratory have the right size? • Outer scale comparable to large earthquake fault dimension • Outreach works well with a self-contained community • Knowledgeable and interested public & media – Cultural, socio-economic needs

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Simulations of San Andreas Ruptures (Olsen, 2000)

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Simulations of San Andreas Ruptures (Olsen, 2000)

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Scientific Critical Mass • • • 10 Institutions of higher

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Scientific Critical Mass • • • 10 Institutions of higher learning Research, Students 150 scientists work at SCEC USGS, CDMG, NASA presence Excellent computing and communication infrastructure • Collaborators worldwide

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Exporting know-how • • Model for Outreach Model of instrumentation

SOUTHERN CALIFORNIA EARTHQUAKE CENTER Exporting know-how • • Model for Outreach Model of instrumentation Model for open data Model for sharing instruments