The East Molokai Volcano, sometimes also known as Wailau for the Wailau valley on its north side,[1] is an extinct shield volcano comprising the eastern two-thirds of the island of Molokaʻi in the U.S. state of Hawaii.

It is overlapped by the West Molokai, Lanai and Haleakalā shield volcanoes.

The pahoehoe shield volcano of the Kalaupapa Peninsula postdates the main shield volcano of East Molokai and is considered to represent the last volcanic phase of East Molokai.

[4] The northern flank of the volcano has been truncated by enormous cliffs rising 900 m (3,000 ft) from the sea.

The landslide was so fast and powerful that it extended 190 km (120 mi) into the sea, and generated a 600 m (2,000 ft)-high megatsunami that inundated the rest of Molokai and severely damaged the surrounding Hawaiian Islands before eventually reaching the coastlines of California and Mexico.