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ARDENT SENTRY is the annual major U.S. Northern Command exercise program. This year's exercise features a 9.0 earthquake occurring 60 miles off the Oregon coast creating a complete rupture of the Cascadia Subduction Zone and creating a Tsunami with wave heights 20 to 80 feet.

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Photo by: Courtesy Graphic |  VIRIN: 160610-D-ZZ999-011.JPG