Which Antarctic volcano has a persistent lava lake?

Mount Erebus is the Antarctic volcano known for having a persistent lava lake.

Located on Ross Island, Mount Erebus is the southernmost active volcano on Earth. Its summit contains a long-lived, convecting phonolitic lava lake in the Inner Crater, where molten rock remains exposed and continuously releases volcanic gases.

The lava lake has been observed since at least the early 1970s. Its relatively steady Strombolian activity makes Erebus an important natural laboratory for studying how magma rises, degasses, and occasionally bursts from an active vent.

Mount Erebus is often confused with Mount Terror because both volcanoes stand on Ross Island. Terror, however, is inactive, while Erebus is the island’s active volcanic centre. Erebus was named in 1841 by explorer James Clark Ross after his ship, HMS Erebus.