Mount Erebus

Mount Erebus is the most southerly active volcano in the world. It is 3,794 metres (12,448 ft) high and situated on Ross Island, which also has three inactive volcanoes. Mount Erebus was named by James Clark Ross in 1841 after one of his ships, the second highest but extinct volcano on Ross Island was named Terror after the other ship on his expedition (the other two inactive volcanoes on Ross Island are Mount Terra Nova and Mount Bird).

Mount Erebus is notable for being one of the very few active volcanoes on earth that has a permanent lava lake in the winter in the right conditions it is possible to see the glow from the lava lake against the sky.

Mount Erebus is part of the Pacific Ring of Fire, which includes over 160 active volcanoes.

Mount Erebus dominates Ross Island. McMurdo Base is on the spit of land to the bottom left,
Mount Terror is the mountain to the right side of the island in this map

The lava lake of Mount Erebus as seen from space picture courtesy Nasa The Mount Erebus Volcano Observatory

Picture courtesy of Mike Usher - Mike went on a Ross Sea expedition on board the Kapitan Khlebnikov in 2005.
You can purchase a selection of Mike's pictures here