Crews are finishing up digging a 125-foot hole to install a test foundation that they'll use to test the earthquake-resistant ...

Along this fraught stretch, called the Cascadia Subduction Zone, two pieces of the Earth’s crust slide against each other, building up stresses capable of unleashing a catastrophic 9.0-magnitude ...

The Cascadia subduction zone, where the oceanic Juan de Fuca plate descends beneath the overlying North American plate, extends 1100 km from northern California to northern Vancouver Island.

Currently, none of Portland's bridges open to vehicular traffic that span the Willamette River would survive a major Cascadia Subduction Zone earthquake, leaving the city's core potentially cut ...

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 ...

The Pacific Northwest is at risk for a mega-earthquake because of the Cascadia Subduction Zone. The region is primed for powerful quakes, with a particularly strong one called the Big One ...

January 26 marked the 325th anniversary since the last earthquake struck the Cascadia Subduction Zone. Centuries later, the ancient quake has left clues for scientists to prepare for the next one.

PORTLAND, Ore. (KOIN) – January 26 marked the 325th anniversary since the last earthquake struck the Cascadia Subduction Zone. Centuries later, the ancient quake has left clues for scientists to ...

Mayor McEnerny-Ogle said "Pressure is mounting for another (Cascadia Subduction Zone) megathrust," one that could take down both I-5 spans. It was 325 years ago this week when the Cascadia ...

Cities, including Portland, conducted the Iron-OR 24, a two-day simulation exercise ... However, Portland sits in the Cascadia Subduction Zone which is more inland than the BFZ.