A subduction zone is created where two plates converge, with one sinking into the mantle. Dynamics along the plate interface create earthquakes, magma generated above the sinking slab leads to ...

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 ...

but the real, much less common, bigger threat every few 100 years is from a 9-plus magnitude quake from the Cascadia Subduction Zone," explained FOX 35 Meteorologist Noah Bergren. The Cascadia ...