1. 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 CISN and Earthquake Engineering Progress

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

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

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

7. (Pile Tip Sensors) (Tilt Sensor)

8. North End South End Tilt

11. 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 South Napa Earthquake of 2014