<P> The subduction of the Pacific Plate below the North American Plate along the Aleutian Trench is associated with numerous earthquakes . Several of these earthquakes are notable for their size and / or associated tsunamis . </P> <Ul> <Li> April 1, 1946 Aleutian Islands earthquake: This magnitude 8.1 earthquake occurred offshore Unimak Island, and caused only minor damage on land . However, the shaking generated a tsunami which killed 5 on the island and caused damage on other Aleutian Islands and North and South America . In Hilo, Hawaii, the tsunami killed 159 and caused extensive damage . </Li> <Li> March 9, 1957 Andreanof Islands earthquake: This magnitude 8.6 earthquake occurred south of the Andreanof Islands . The earthquake itself caused damage on Adak Island and Umnak Island and generated a Pacific - wide tsunami . The tsunami caused extensive damage in Scotch Cap on Unimak Island, including the destruction of the Scotch Cap Light, and destroyed two villages in the Hawaiian Islands . The tsunami was recorded as far away as Chile . </Li> <Li> February 4 1965 Rat Islands earthquake: This magnitude 8.7 earthquake triggered a tsunami that struck Shemya Island and was observed around the Pacific, but caused little damage . </Li> <Li> May 7, 1986 Andreanof Islands earthquake: This magnitude 7.9 earthquake caused damage on Adak Island and Atka Island . The resultant tsunami was recorded throughout the Pacific . </Li> <Li> On June 23, 2014, a 7.9 quake occurred near Little Sitkin Island, Alaska . </Li> <Li> On July 17, 2017, a magnitude 7.7 quake occurred 198 km ESE of Nikol'skoye Russia . </Li> </Ul> <Li> April 1, 1946 Aleutian Islands earthquake: This magnitude 8.1 earthquake occurred offshore Unimak Island, and caused only minor damage on land . However, the shaking generated a tsunami which killed 5 on the island and caused damage on other Aleutian Islands and North and South America . In Hilo, Hawaii, the tsunami killed 159 and caused extensive damage . </Li> <Li> March 9, 1957 Andreanof Islands earthquake: This magnitude 8.6 earthquake occurred south of the Andreanof Islands . The earthquake itself caused damage on Adak Island and Umnak Island and generated a Pacific - wide tsunami . The tsunami caused extensive damage in Scotch Cap on Unimak Island, including the destruction of the Scotch Cap Light, and destroyed two villages in the Hawaiian Islands . The tsunami was recorded as far away as Chile . </Li>

What process created the aleutian islands next to the aleutian trench