Data and Resources:
The nodal seismic data used in this study are available from the IRIS
DMC (dmc.iris.edu) under the network code 8J (doi: 10.7914/SN/8J_2019).
The IRIS DMC is supported by the National Science Foundation under
Cooperative Support Agreement EAR-1851048. We obtained digital elevation
data for Figures 1a and 1c from the GEBCO Compilation Group
(doi:10.5285/a29c5465-b138-234d-e053-6c86abc040b9, last accessed August
2021). Geologic map data for Figure 1b and 1c was obtained from the USGS
Scientific Investigations map 3340
(https://pubs.er.usgs.gov/publication/sim3340,
last accessed August 2021).