WASHINGTON, USA — A "swarm" of small earthquakes near the summit of Mount Rainier Tuesday is no cause for concern, according ...

A 700-mile fault could snap by 2075, sinking parts of Portland, Seattle & SF. The Cascadia megaquake may trigger a 100-ft ...

A schematic cross section of the Cascadia Subduction Zone shows the ocean floor plate (light gray) moving under the North American continental plate, along with other features. Credit: U.S ...

New evidence suggests current estimates about tsunami size and how quickly waves make it to shore may be too high and too ...

Jan. 26, 2025, marks 325 years since the last great earthquake on the Cascadia subduction zone. It’s a time to reflect on what we’ve learned about this largest fault system in the lower 48 ...

Slow-motion earthquakes, as you might guess from the name, involve the release of pent-up geological energy over the course ...

“The Cascadia Subduction Zone is so large if it unzipped from one end to the other, it would take on the order of four to five minutes for that event to occur.

The Cascadia Subduction Zone, stretching from northern California to British Columbia, is one of the most dangerous seismic hotspots in North America, capable of producing a massive 9.0 magnitude ...

Two small earthquakes struck the South Bay on Tuesday. The quakes hit less than two hours from each other. LOS ALTOS, Calif. ...

OSU part of new earthquake center that aims to advance understanding of Cascadia Subduction Zone US Geological Survey Cascadia Subduction Zone off the Pacific Northwest coast By KTVZ News Partners ...

A new study has produced the first comprehensive survey of the many complex structures beneath the seafloor in the Cascadia Subduction Zone, off British Columbia, Washington, Oregon and California ...

A Cascadia Subduction Zone earthquake could cause long-lasting changes to Washington’s landscape, coastline and floodplain, a new study says.