Earthquake and exploration seismology share a common foundation in elastic wave propagation. Most of what we know about earthquakes is known from the elastic waves they emit, while seismic methods in exploration are all about using scattered elastic waves to image earth structure. Seismologists have been using elastic waves to probe the earth since the very earliest instruments. After all, it was early seismic measurements that led to the spherical shell model of earth structure (crust, mantle, and core) taught to grade school students.

Until the emergence of the IRIS-PASSCAL facilities just over a decade ago, however, there was a...

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