The Sound of an Interstellar Meteor Might Have Just Been a Rumbling Truck

A 2023 expedition to the Pacific Ocean, searching for debris from a suspected extraterrestrial object, may have been looking in the wrong place. A new look at the infrasound data used to locate the point of impact suggests that they may have been confused by the rumblings of a truck driving past.

The Oumuamua discovery led many scientists to start searching for other interstellar objects. CNEOS 2014-01-08, with its high reported speed, looked like a promising candidate. The physicist who had made such a big deal about Oumuamua being artificial took a closer look at the bolide reports and concluded that it must have been traveling fast enough to be another extrasolar object.

The area near the seismic station in Manus Island, based on satellite images. Image credit: Roberto Molar Candanosa and Benjamin Fernando/Johns Hopkins University, with imagery from CNES/Airbus via Google.The most recent challenge to the results of this expedition come from a team led by Dr Benjamin Fernando of Johns Hopkins University.They noticed a number of problems with the expedition’s analysis, starting with the fact that none of the detections happened within 30 seconds of the fireball.

But their most damning claim is this: The strongest signal had an unusual pattern, lasting a long time and coming from a direction which changed halfway. They noticed that there is a road passing near the station, with a curve in it that matches the change in direction of the signal. They point out that the signals recorded by trucks driving that road are a far closer match than any natural event.

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'Interstellar meteor' vibrations actually caused by a truck, study suggestsMichael Wall is a Senior Space Writer with Space.com and joined the team in 2010. He primarily covers exoplanets, spaceflight and military space, but has been known to dabble in the space art beat. His book about the search for alien life, 'Out There,' was published on Nov. 13, 2018.
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