More than 18 quakes were recorded in an “active swarm” of tremors starting around midnight Sunday on the Juan de Fuca Ridge.

A swarm of 18 earthquakes ranging from magnitude 2.6 to 4.2 struck the coast of Washington early Sunday morning, with the ...

Recent seismic imaging off Vancouver Island has revealed something extraordinary: a tear in the subducting oceanic plate ...

A new study in GSA Bulletin aims to better determine how often and where faults trigger earthquakes beneath central Seattle.

A magnitude 4.0 earthquake struck off the Oregon coast on Tuesday. The quake hit in the early afternoon about 250 miles west ...

The Cascadia Subduction Zone off the Pacific Northwest is overdue for an earthquake – and when it happens, coastal ...

The Pacific Northwest coast has been living under the shadow of the 620-mile-long Cascadia Subduction Zone, where the Juan de Fuca tectonic plate is steadily pushing under the North American plate.

Earthquakes usually feel sudden and unpredictable, but deep below the ground, slow and steady movement of tectonic plates shape the regions where strong seismic activity is likely to occur. One of the ...

There’s a small silver tent in an engineering lab at Portland State University — the heavy-duty type that you can walk into. “This is what I call the magic tent, where all the chemistry and all the ...

There’s a beach in Oregon where ancient tree stumps rise from the sand like nature’s own sculpture garden, and no, you haven’t accidentally wandered onto a movie set. The Neskowin Ghost Forest in ...

This map models locking at the Cascadia Subduction Zone, with red showing where the plates are tightly locked and orange/yellow indicating less locking. The study sites are marked with small red ...