Watch Simulation of Huge Earthquake off Washington Coast [VIDEO]

Reports vary, some scientists say 50-60 years, others sooner, some later. But eventually, they all believe we will see a major catastrophic earthquake and tsunami. The Pacific Tsunami Warning Center, part of the National Weather Service, has created a simulation of what it would do.

The Cascadia Fault lies between 50-70 miles off the Pacific Coasts of CA, OR and Washington state. It varies as the fault makes it's way up the coast. But it's a big one, and scientists believe it's due for movement. For years, it was ignored, because it didn't seem to do anything. But the more scientists study it, and see some little bits of movement, they realize it would produce the biggest quakes ever seen in the hemisphere, perhaps the world.

Numerous scientists, geologists and other experts are conducting training this spring in an event called Cascadia Rising. It's designed to prepare emergency crews, rescue workers, scientists and officials for what to do in case the fault moves.

Most conservative estimates show damage from a tsunami produced by the quake would be severe at least 20-40 miles inland, and very strong nearly a quarter of the way into the state-including Seattle.

The Department of Natural Resources has mapped out where and how the damage would be spread. It's based upon research and study showing the Cascadia Fault produces a 9.0 quake every 200 to 700 years. The last such quake was in 1700, some 316 years ago. That's why scientists are especially interested, as there's been activity along the fault line.

It might not happen in our lifetime, but if it does, scientists want to be prepared. And if you think it's only confined to the west side, think again. Tremors and activity would be felt as far away as Spokane and Tri-Cities.

Experts say Cascadia makes the San Andreas fault look like a tiny fracture when you compare their sizes. How big was the 1700 quake? Geologists studying the Washington and Oregon coast found that quake dropped the Pacific Coast shoreline by FIVE feet.

This video is a simulation of what the last such quake in 1700 did, producing huge tsunami waves across the entire ocean.