The USArray project has produced a remarkable animation showing how earthquake waves travel across massive expanses of landmasses. As you'll see in this video, these waves are a lot like ripples on a pond. Very powerful ripples.
To create this visualization, the USArray deployed a mobile network of seismometers across the U.S. — and they've been doing so for over a decade. Incredibly, the devices are so sensitive that they can measure ground movements less than the width of a human hair.
This work is similar to the one being done by seismologists at Berkeley and Caltech who recently created a visualization of earthquakes coursing through California.