To have this size quake in this area is a dangerous development. These plates are converging Let's Get Prepared Together! Understanding the True Risk… is Everything .

Click on the county or county name from the list below to view/download that county's Tsunami Inundation Maps. Stretching off the Pacific shore from northern California some 1300 kilometers to the tip of Vancouver Island, the Cascadia subduction zone appears capable of its own magnitude 9 earthquake. This second edition of . The CSZ is the tectonic plate boundary between the North American Plate and the Juan de Fuca Plate (Figure 1). Located off the Pacific Northwest coast, this plate runs from central Vancouver Island, B.C. to northern California. The CSZ has a history of producing large earthquakes and will produce 8.5M earthquakes or larger in the future. Cascadia Subduction Zone. Cascadia, 2. and tsunami modeling tools to prepare more effectively, and the entire earthquake and emergency response community has learned volumes from recent subduction zone earthquakes and tsunamis in the Indian Ocean, Chile, and Japan. generation of tsunami inundation maps to help residents and visitors along the entire Oregon coast prepare for the next Cascadia Subduction Zone (CSZ) earthquake and tsunami. The Cascadia Subduction Zone (CSZ) is a 1,000 kilometer fault where the Juan de Fuca and North American plates meet. Cascadia Subduction Zone … We prepare for emergencies – or don’t – based on our perceived risk. Cascadia is America's own tectonic version of Sumatra, where the magnitude 9.3 earthquake and tsunami of 2004 occurred. The Pacific Northwest is the site of the Cascadia subduction zone, where an oceanic tectonic plate (the Juan de Fuca plate) is being pulled and driven (i.e., subducted) beneath a continental plate (the North American plate). ... 10,000 Years; Segments; The 46; Calculations; Supplies; Magnitudes 4.0 – 7.0; Resources; Research Papers; Welcome; Surviving Cascadia.

The Cascadia Subduction Zone is the place where "The Big One" will emanate, if it comes. There have been 41 earthquakes in the last 10,000 years within this fault that have occurred as few as 190 years or as much as 1200 years apart. Most folks think the San Andreas Fault in southern California is where "The Big One" will originate, but that is not accurate. The Cascadia Subduction Zone is a 600-mile fault that runs from northern California up to British Columbia and is about 70-100 miles off the Pacific coast shoreline. Coordinated by Cal OES, these official maps are developed for all populated areas at risk to tsunamis in California and represent a combination of the maximum considered tsunamis for each area (Inundation Map Methodology (poster)).