SOUND waves linked to a meteor crash thought to be suggestive of alien origin have been linked to a less mysterious source.
The meteor crash took place in 2014 and landed north of Papua New Guinea, puzzling many researchers and people.
The incident had been linked to some sound waves that were linked to some materials that were pulled from the ocean last year, reports Phys.org.
It's now believed that the sound waves were made by a truck driving on a nearby road, raising doubts that the materials that were collected were of alien origin.
The finding was made by some researchers from Johns Hopkins University.
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"The signal changed directions over time, exactly matching a road that runs past the seismometer," said Benjamin Fernando, the planetary seismologist who led the research.
"It's really difficult to take a signal and confirm it is not from something."
"But what we can do is show that there are lots of signals like this, and show they have all the characteristics we'd expect from a truck and none of the characteristics we'd expect from a meteor."
The researchers will be discussing their findings at the Lunar and Planetary Science Conference in Houston.
The conference will take place on March 12.
The meteor in question entered Earth in January 2014 and was linked to the vibrations recorded in Papua New Guinea.
Last year, various materials near the meteor landing were recovered.
Many believed these to be of alien origin due to the relationship that existed between the sound waves and the meteor's crash.
"The fireball location was actually very far away from where the oceanographic expedition went to retrieve these meteor fragments," explained Fernando.
"Not only did they use the wrong signal, they were looking in the wrong place."
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Fernando and the team of researchers concluded that the materials that were recovered were likely ordinary meteorites and have no relation to aliens.
"Whatever was found on the sea floor is totally unrelated to this meteor, regardless of whether it was a natural space rock or a piece of alien spacecraft—even though we strongly suspect that it wasn't aliens," concluded Fernando.
