<P> The Juan de Fuca Plate is a tectonic plate generated from the Juan de Fuca Ridge and is subducting under the northerly portion of the western side of the North American Plate at the Cascadia subduction zone . It is named after the explorer of the same name . One of the smallest of Earth 's tectonic plates , the Juan de Fuca Plate is a remnant part of the once - vast Farallon Plate , which is now largely subducted underneath the North American Plate . </P>
where is the juan de fuca plate located
Cascadia subduction zone underneath the North American Plate