The seamount chain , containing over 80 identified undersea volcanoes , stretches over 5,800 kilometres ( 3,600 mi ) from the Aleutian Trench in the far northwest Pacific to the Loʻihi seamount , the youngest volcano in the chain , which lies about 35 kilometres ( 22 mi ) southeast of the Island of Hawaiʻi .
The seamount chain , with over 80 identified undersea volcanoes , stretches over 5,800 kilometres ( 3,600 mi ) from the Aleutian Trench in the far northwest Pacific to the Loʻihi seamount , the youngest volcano in the chain , which lies about 35 kilometres ( 22 mi ) southeast of the Island of Hawaiʻi .