Mauna Loa

Mauna Loa, active volcano, on Hawaii Island, at the western end of Hawaii Volcanoes National Park, one of the world's largest volcanoes. It rises from a desolate landscape of old lava flows to a high point of 4,170 m (13,680 ft) above sea level in the summit caldera (enlarged crater) of Mokuaweoweo. Lava from Mauna Loa covers about 50 percent of Hawaii Island, including parts of Kilauea, another volcano, situated to the east. Since the early 19th century, Mauna Loa has exuded lava about once every four years.