Māhukona is a submerged shield volcano on the northwestern flank of the Island of Hawaiʻi.

A second rift zone probably extended to the east but has been buried by younger volcanoes.

The main shield-building stage of volcanism ended about 470,000 years ago.

[1] Māhukona is the oldest volcano to build Hawaiʻi island, older than Kohala and Mauna Kea.

[2] The Monterey Bay Aquarium Research Institute investigated the area with a remotely controlled submarine in 2001.