Science Visualized Earth

Seismic signals chronicle deadly landslide

Oso, Wash., landslide

LANDSLIDE SHOCK  A landslide on the North Fork of the Stillaguamish River outside Oso, Wash., on March 22 generated seismic waves like those unleashed during an earthquake.

Ted S. Warren/Associated Press

By Erin Wayman

- More than 2 years ago

At 10:37 a.m. local time on March 22, as much as 5 million cubic meters of sediment slid down a hillside outside Oso, Wash., killing dozens and damming a stretch of the North Fork of the Stillaguamish River.