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Brothers Fault Zone
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Movement
Predictions
The last known Great Earthquake in the Northwest was the 1700 Cascadia Earthquake. There is a 10% - 14% prediction of the next Great Earthquake to happen in 50 years at a 9.0 magnitude. There is also a 37% prediction that it could happen at a 8.0 magnitude in 50 years..
This area is often referred to the Cascadia Subduction Zone. This is classified as a convergent boundary and goes from Vancouver Island to Northern California. The North American plate is moving into the Oceanic plate and forcing it downward. These plates move about 44mm per year.
Convection Current
The convection current moves the plates up and into each other, then the current goes down and comes back up pushing the plate farther into another plate.
Affects
Brothers Fault Zone
The Cascadia Zone can cause a very large earthquake because the zone is so big. The subducted ocean plate heat up in the molten rock and are pushed farther under the continental plate, As the molten rock heats up it can no longer with stand the pressure being put on it, therefore it snaps; which generates Earthquakes. The longer the plate takes to subducted the and heat up the more the magnitude increases on the Earthquake.
Classified as a Strike Slip Fault; located just above the Basin Range and just to the East of the Cascade Mountains. Slightly cuts into the Lava Plain.