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Colorfully shaded map of the seafloor showing the many unique canyons created by nearby rivers.
Topography and Bathymetry of Southern Cascadia
Topography and Bathymetry of Southern Cascadia
Topography and Bathymetry of Southern Cascadia

Topography and bathymetry of southern Cascadia, which includes southern Oregon and northern California (seafloor depths between 200 and 3000 m are shown in the spectrum color scale from red (shallower) to purple (deeper). The land and continental shelf are shown in grayscale slope shading where darker colors represent steeper slopes.

Topography and bathymetry of southern Cascadia, which includes southern Oregon and northern California (seafloor depths between 200 and 3000 m are shown in the spectrum color scale from red (shallower) to purple (deeper). The land and continental shelf are shown in grayscale slope shading where darker colors represent steeper slopes.

photo of dead trees along a coastline with water and background mountains
Drowned Forest in Girdwood, AK from 1964 Alaska Earthquake and Tsunami
Drowned Forest in Girdwood, AK from 1964 Alaska Earthquake and Tsunami
Drowned Forest in Girdwood, AK from 1964 Alaska Earthquake and Tsunami

Shaking during the 1964 Alaska earthquake was felt as far away as Seattle, Washington, and its tsunamis caused 129 fatalities and about $2.3 billion in property losses (2013 dollars).

Shaking during the 1964 Alaska earthquake was felt as far away as Seattle, Washington, and its tsunamis caused 129 fatalities and about $2.3 billion in property losses (2013 dollars).

Tectonic Features of World with Subduction Zones Highlighted
Tectonic Features of World with Subduction Zones Highlighted
Tectonic Features of World with Subduction Zones Highlighted
Tectonic Features of World with Subduction Zones Highlighted

Tectonic Features of World with Subduction Zones Highlighted. (modified from This Dynamic Planet)

Tectonic Features of World with Subduction Zones Highlighted. (modified from This Dynamic Planet)