Explore the USArray website to understand the 'Episodic Tremor and Slip' research. What new understanding did this research, leveraging USArray and Plate Boundary Observatory data, reveal about the probable region of strong ground motion during future Cascadia earthquakes? Provide the key finding.
Navigate to 'usarray.org'. Click on the 'Science' link. Click on the 'Episodic Tremor and Slip' link. Locate and extract the key finding regarding the probable region of strong ground motion during future Cascadia earthquakes.
State that the understanding has changed such that the probable region of strong ground motion during future earthquakes extends 'significantly further inland than had been thought, closer to the large population centers of Cascadia'.