According to research presented at a three-day conference, the transmissions hit the air waves just hours after Earhart sent her last in-flight message.
"Amelia Earhart did not simply vanish on July 2, 1937. Radio-distress calls believed to have been sent from the missing plane dominated the headlines and drove much of the U.S. Coast Guard and Navy search," Ric Gillespie, executive director of TIGHAR, told Discovery News.
The new research suggests the radio signals were sent out after noon (local time) on July 2, 1937 through July 18, 1937. Experts think about 47 percent of the signals they discovered are considered credible.
"The results of the study suggest that the aircraft was on land and on its wheels for several days following the disappearance," Gillespie said.
The radio transmissions make it sound like Earhart landed near Gardner Island - now called Nikumaroro.
The International Group for Historic Aircraft Recovery plan to investigate this uninhabited island to see if they can find Earhart's plane.
Find out more about the Amelia Earhart investigation here.
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