Berkeley Geologists Discover New Feature of the Cascadia Subduction Zone

February 7, 2017

Using a 3D imaging technique called seismic tomography and data gathered from more than 1,000 on- and offshore seismometers, researchers William Hawley, Richard Allen, and Mark Richards have captured a clearer picture of one portion of the earth’s elusive deep structure. It’s a giant, sausage-shaped accumulation of buoyant material beneath the Juan de Fuca Plate—an oceanic plate nearly the size of Michigan. The plate’s western edge runs from Northern California to Vancouver Island, Canada.