The shallow gradient in seismic velocity used for rock sites with Z2.5200  m in the 3D velocity model for finite‐difference simulations was incorrectly described in Frankel et al. (2018). Z2.5 is the depth to a shear‐wave velocity VS of 2.5  km/s. Instead of the gradient being applied over the top 500 m of the model as described in the article, the gradient was implemented over the top 200 m. We emphasize that this difference only applies to hard‐rock sites with Z2.5200  m.

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This steeper gradient does...

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