The Disappearance of Amelia Earhart

Amelia Earhart was the most famous woman aviator in the world, the first woman to fly solo across the Atlantic. In 1937 she set out to fly around the world near the equator in a twin-engine Lockheed Electra 10E, with Fred Noonan, an experienced former Pan American navigator. After weeks of travel eastward from California across South America, Africa and Asia, they reached Lae in New Guinea. The remaining legs lay across the Pacific, and the next one, to Howland Island, was the longest and most difficult of the trip.

On 2 July 1937 they took off from Lae for Howland, a flat island about two kilometres long and a few metres high, thousands of kilometres away across open ocean. The US Coast Guard cutter Itasca was stationed at Howland to act as a radio contact and guide. As the expected arrival time came, the Itasca heard Earhart’s voice transmissions, increasingly strong, saying she believed she was near the island but could not see it and that fuel was running low. Her messages suggested she could not hear the ship’s replies.

In her last transmission received with confidence, Earhart reported that she was flying along a north and south line of position. Nothing more was heard from the Electra at Howland. The US Navy and Coast Guard launched a search involving ships and aircraft, including a battleship and an aircraft carrier, over a large area of the central Pacific. It lasted more than two weeks and found no trace of the aircraft or its crew. Earhart was legally declared dead in January 1939.

The contemporary evidence is mainly the Itasca’s radio logs and the accounts of those on board. They show two-way communication failing: Earhart’s transmissions were heard, but attempts to give her radio bearings did not work, and she seems not to have received the ship’s signals. Accounts differ on the reasons, but mismatched frequencies, the limits of her direction-finding equipment and changes to the aircraft’s antenna arrangement before departure are all commonly cited. Her messages about low fuel and her line of position are the last firm data points.

After the disappearance, a number of people across the Pacific and beyond reported hearing radio signals they believed came from Earhart. Some of these were investigated at the time and many were judged unreliable or hoaxes. Supporters of a landing on land argue that a subset of these signals is credible, because an aircraft in the sea could not have transmitted. Sceptics note that the reports are inconsistent and that none was ever confirmed.

Physical evidence is thin. In 1940, British colonial officials on Gardner Island, now Nikumaroro in Kiribati, found a partial human skeleton and some artefacts. The bones were measured by a doctor who judged them to be male, and they were later lost. In 2018, anthropologist Richard Jantz reanalysed the recorded measurements and argued they were more consistent with Earhart than with most people. Other items reported from the island over the years, including aluminium fragments, have not been conclusively linked to the Electra.

The US Navy search concluded that the Electra most probably came down in the ocean somewhere near Howland Island after running out of fuel, and sank. This crash-and-sink explanation remains the view of most aviation historians. It needs no additional assumptions: the aircraft was near the end of its fuel, the crew said they could not find the island, and the surrounding sea floor lies thousands of metres deep, where a small aircraft could easily lie undetected.

Supporters of this view, including researchers who have funded deep-sea sonar searches in the area, argue that the strength of Earhart’s final transmissions places her close to Howland and that the line of position she described runs through it. Several sonar surveys of the seabed near the island have been carried out over the years. None has located the Electra. In 2024 a company reported a sonar image it suggested could be the aircraft, but a follow-up examination later that year reportedly found it to be a natural rock formation.

The Nikumaroro hypothesis, promoted for decades by The International Group for Historic Aircraft Recovery, known as TIGHAR, holds that Earhart and Noonan followed their line of position southeast, reached Gardner Island, landed on its reef flat at low tide and survived for a time as castaways. Supporters point to the 1940 bones and their reanalysis, the reported post-loss radio signals and a range of artefacts. Critics argue that the identification of the bones cannot be tested without the bones themselves and that none of the artefacts has been proven to come from the aircraft or its crew.

A third theory holds that the pair came down in the Marshall Islands, then under Japanese control, and were captured and died in Japanese custody, possibly on Saipan. It rests largely on later recollections by islanders and veterans. No Japanese or American document confirming a capture has been found. In 2017 a television documentary promoted a photograph said to show the two in the Marshall Islands, but the image was quickly found to have been published in a Japanese book before the disappearance.

Other claims, such as the idea that Earhart survived and lived on under another name in the United States, have been investigated and rejected, and the woman identified in one such claim denied it. These theories persist mainly because the absence of wreckage leaves room for them, not because evidence supports them.