This electronic supplement contains five figures to explain in more detail the methods used in the study and shows station location and dislocations, and travel-time residuals.
Figure S1. The triangles show the station locations of the USArray reference network used in this study.
Figure S2. (a) Travel-time residuals observed at some of the reference network for one earthquake. (b) The travel-time residuals at the reference stations (a) interpolated to all the USArray stations. We use the mean of all these values at the source term.
Figure S3. Station mislocation vectors estimated from synthetic Pn times based on the uppermost mantle Pn velocity model and crustal thickness of Buehler and Shearer (2014). Simulated events are set up in a 3° radius around a station.
Figure S4. Station mislocation vectors estimated from synthetic Pn times based on the uppermost mantle Pn velocity model and crustal thickness of Buehler and Shearer (2014). Simulated events are set up in a 5° radius around a station.
Figure S5. Station mislocation vectors estimated from synthetic Pn times based on the uppermost mantle Pn velocity model and crustal thickness of Buehler and Shearer (2014). Simulated events are set up in a 8° radius around a station.
Buehler, J. S., and P. M. Shearer (2014). Anisotropy and VP/VS in the uppermost mantle beneath the western United States from joint analysis of Pn and Sn phases, J. Geophys. Res. 119, no. 2, 1200–1219.
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