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Structure of the Cascadia subduction zone. The Cascadia subduction zone is a 1,000 km (620 mi) long dipping fault that stretches from Northern Vancouver Island to Cape Mendocino in northern California. It separates the Juan de Fuca and North America plates. New Juan de Fuca plate is created offshore along the Juan de Fuca Ridge.
English: A scenario macroseismic intensity map of the median ground motion values from magnitude 9.0 scenario earthquake on the Cascadia Subduction Zone. Maximum intensity of IX (Violent). Maximum intensity of IX (Violent).
The Cascadia bioregion. The area from Vancouver, B.C. down to Portland, Oregon has been termed the Cascadia Megaregion, a megaregion defined by the U.S. and Canadian governments, especially along the 'Cascadia Corridor'. Megaregions are defined as areas where "boundaries begin to blur, creating a new scale of geography now known as the megaregion.
The Doug flag, also referred to as the Cascadian flag [1] or the Cascadia Doug flag [2] and nicknamed "Old Doug" [3] or simply "the Doug", is one of the primary symbols and an unofficial flag of the Cascadia bioregion, which roughly encompasses the U.S. states of Oregon and Washington, the Canadian province of British Columbia, and other parts of North America's Pacific Northwest.
English: A map showing the two definitions of the proposed "Republic of Cascadia." Green shows the American states of Oregon and Washington; and the Canadian province of British Columbia (which make up the standard definition). The black-dotted line marks the border of the Cascadia bioregion (which is also mentioned as a border).
None of the multiple possible definitions of the Pacific Northwest is universally accepted. This map shows three possibilities: (1) The shaded area shows the historical Oregon Country. (2) The green line shows the Cascadia bioregion. [6] (3) The labeled states and provinces include Washington, Idaho, Oregon and British Columbia.
Map of the Garibaldi Volcanic Belt centers. The Garibaldi Volcanic Belt in southwestern British Columbia is the northern extension of the Cascade Volcanic Arc in the United States and contains the most explosive young volcanoes in Canada. Like the rest of the arc, it has its origins in the Cascadia subduction zone.
This map shows three possibilities: (1) The shaded area shows the historical Oregon Country. (2) The green line shows the Cascadia bioregion. (3) The labeled states and provinces include Washington, Idaho, Oregon and British Columbia. (from Pacific Northwest)