The State Department plans to join a new effort to find the plane of pioneering aviator Amelia Earhart, 75 years after she mysteriously disappeared over the South Pacific.

Secretary of State Hillary Rodham Clinton and Transportation Secretary Ray LaHood will take part in a ceremony Tuesday morning announcing the joint public-private search at the State Department, The Wall Street Journal reports. The event, "Amelia Earhart, a Pacific Legacy," which is pitched as a celebration of the U.S.'s pan-Pacific ties, will be streamed live at 9 a.m. on the State Department's website, a spokesman for the agency said.

Earhart's twin-engine Lockheed vanished July 2, 1937, as she and her navigator, Fred Noonan, left New Guinea (now Papua New Guinea) on their way to Howland Island in the South Pacific as part of an attempt to circle the Earth.

The half-million-dollar search, financed with private funds, will begin in July. The key area is the Pacific atoll of Nikumaroro between Hawaii and Australia, The Journal reports:

A search team will concentrate on the deep waters near Nikumaroro, which was the site of a 2010 search that focused on coral reefs and nearby shallow waters, these people said.