Mauna Ulu

Mauna Ulu is a volcanic cone in the eastern rift zone of the Kīlauea volcano on the island of Hawaii.

It falls within the bounds of Hawaiʻi Volcanoes National Park.

The eruption that formed Mauna Ulu began on May 24, 1969 and continued until July 22, 1974.

[1] At the time, this was the longest-lasting and most voluminous eruption on Kīlauea's flank in at least 2,200 years, lasting 1,774 days and producing 350 million cubic meters of lava.

The flows destroyed parts of the Chain of Craters Road, but the damage has since been repaired and the dormant cone can now be visited.

Mauna Ulu erupting in 1974
Cutaway view of Kilauea's eastern rift zone. Mauna Ulu can be seen to the right of Kilauea Caldera.
Toadstool-shaped formations dot the desolate landscape of Mauna Ulu.
Scheme of a Hawaiian eruption