Area of the Cascadia subduction zone, including the Cascade Volcanic Arc (red triangles), site of recurring megathrust earthquakes at average intervals of about 500 years, including the Cascadia Earthquake of USGS
The Cascadia Subduction Zone (CSZ) 'megathrust' fault is a Km long dipping fault that stretches from Northern Vancouver Island to Cape Mendocino California.It separates the Juan de Fuca and North America plates.
An ocean data buoy is alerting to an “event” in the Cascadia Subduction Zone off the west coast of Oregon. This is where a magnitude 9 earthquake hit in According to the data buoy, the water column height (depth) fell sharply within minutes.
The Cascadia Subduction Zone off the coast of North America spans from northern California to southern British Columbia. This subduction zone can produce earthquakes as large as magnitude 9 and corresponding tsunamis.
THE CASCADIA SUBDUCTION ZONE: The geography of northern California, Oregon, Washington, and southern British Columbia is shaped by the Cascadia subduction zone, where the North American Plate collides with a number of smaller plates. The smaller plates “subduct” (descend) beneath the North American Plate as they converge along a 700-mile long (1,130 km) boundary. Above: Schematic view of the source area for the largest Cascadia earthquakes.
A. Location and setting of the Cascadia subduction zone showing the extent of the Wrangellia, Siletzia and Klamath episodic tremor and slip zones of Brudzinski and Allen (2007) and paleoseismic sites discussed in the text. Ex.¼Explorer Plate; SS¼Slipstream Slump. 1B. Paleoseismic sites investigated in northern Cascadia.
Cascadia subduction zone worse than San Andreas fault