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Napa Earthquake - Results Strong shaking in epicentral area, low-level shaking throughout Bay area

CISN and Earthquake Engineering Progress. Napa Earthquake - Results Strong shaking in epicentral area, low-level shaking throughout Bay area Recorded strong motion: 340 ground response stations 70 structures 14 geotechnical arrays

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Napa Earthquake - Results Strong shaking in epicentral area, low-level shaking throughout Bay area

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  1. CISN and Earthquake Engineering Progress • Napa Earthquake - Results • Strong shaking in epicentral area, low-level shaking throughout Bay area • Recorded strong motion: • 340 ground response stations • 70 structures • 14 geotechnical arrays • 3000 data channels available from CESMD, StrongMotionCenter.org

  2. PGA vs Rjb Distance • BA08 (Boore-Atkinson, 2008 • Strike-slip • Vs30 = 760 m/s

  3. Geotechnical Downhole Arrays • Records from 14 arrays (Caltrans supported) • Two arrays with strong shaking

  4. Surface 67 ft 150 ft E-W N-S Vert

  5. (Tilt Sensor) (Pile Tip Sensors)

  6. North End South End Tilt

  7. South Napa Earthquake of 2014 • First strong shaking in Bay area since Loma Prieta, 1989 • Many more sites and structure instrumented now: • All major toll bridges (Caltrans supported) • 15 high rise buildings • Many ground stations (both CGS and USGS), CISN stations • Significant new data • 400+ strong motion records vs ~200 • Brought together in StrongMotionCenter.org

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