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Part 1: What is needed to implement ShakeMap?
All of the elements listed below are required to generate a ShakeMap. Prior to January 2001, many of these items were unavailable for Utah's Wasatch Front.
In Part 1 of this poster, we show the results of several months work installing, collecting and calculating the information needed to run ShakeMap.
- A network of digital strong-motion instruments
- Software to compute ground motion parameters from the data
- Peak ground acceleration (PGA), peak ground velocity (PGV), and 5%-damped pseudoacceleration (PSA) attenuation relations appropriate for the region
- A digital map (0.025° grid) of average shear-wave velocities in the uppermost 30m (Vs30) for the ShakeMap region
- Measured or estimated Vs30 values at each station location
- Site amplification by period for each Vs30 map unit
- GMT formatted files of base map information such as city locations, fault traces, roads, and topography
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