The team completed a detailed map of more than 550 miles ... beginning to assess how the new data affects earthquake ...

Multiple earthquakes of magnitude 3.0 and higher struck off the west coast in the Pacific Ocean in the early morning hours of Friday, Oct. 18., according to the Pacific Northwest Seismic Center.

The Pacific Northwest is at risk for a mega-earthquake because of the Cascadia ... scientists were able to create a map of the subduction zone. "The accuracy and this resolution is truly ...

Known as Axial Seamount, it’s the most active volcano in the Pacific Northwest — though one ... t trigger a tsunami or a massive land-based earthquake because of its depth and its distance ...

Last week, about 60 miles off the coast near Ferndale, California, the tectonic plates shifted under the Pacific Ocean, sending seismic waves through the ocean floor that radiated onto land and ...