There are several active volcanoes in Vanuatu, including Lopevi, Mount Yasur and several underwater volcanoes. Volcanic activity is common, with an ever-present danger of a major eruption; a nearby undersea eruption of 6.4 magnitude occurred in November 2008 with no casualties, and an eruption occurred in 1945. Vanuatu is recognised as a distinct terrestrial ecoregion, which is known as the Vanuatu rain forests. It is part of the Australasian realm, which includes New Caledonia, the Solomon Islands, Australia, New Guinea and New Zealand.