Pedzisa mutsara unotevera: Zvitsuwa zveAleutian zviri pedyo nomuganhu unochinjanisa mahwendefa apo Pacific Plate inosangana neNorth American Plate. Nzvimbo inosangana mahwendefa aya inoratidzwa pasi pegungwa neAleutian Trench. Pacific Plate inodonha pasi peNorth American Plate pamwe neAleutian subduction zone iyo inotambanuka kweanenge makiromita zviuru zvina. Nzvimbo inonyura mvura iri nzvimbo yakakura ine zvikanganiso zvinogona kukonzera kudengenyeka kwenyika kukuru, dzimwe nguva kunokonzera tsunami. Nhamba
Kudengenyeka kwenyika kwakaitika muna 1946 kuAleutian Islands uye muna 1964 kuAlaska, kwakanga kwakakura 8.6 uye 9.2.