Researchers in the Science Advances journal have found a "megathrust fault" that could ... long strip beneath North America ...

Tectonic drama at the Cascadia Subduction Zone – as it’s known to those who know – could generate two ferociously destructive things at once: a “megathrust earthquake” and a huge tsunami.

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.

The Cascadia Subduction Zone ... s frictional strength is exceeded and the rocks slip past each other in a “megathrust” earthquake. Washington Geologic Survey Another common misconception ...

JAKARTA, Sept. 24 (Xinhua) -- Indonesia, ranked among top 35 countries for natural disaster risk, is actively preparing for potential megathrust earthquakes that could trigger devastating tsunamis.