High Quality Content by WIKIPEDIA articles! Mount Erebus in Antarctica is the southernmost historically active volcano on Earth, the second highest volcano in Antarctica (after Mount Sidley), and the 6th highest ultra mountain on an island. With a summit elevation of 3,794 metres (12,448 ft), it is located on Ross Island, which is also home to three inactive volcanoes, notably Mount Terror. Mount Erebus is part of the Pacific Ring of Fire, which includes over 160 active volcanoes.