Anonymous ID: 78814e Dec. 2, 2018, 1:35 p.m. No.4117640   🗄️.is 🔗kun

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This Strange Hum Circled the Whole World. But Nobody Heard It.

A seismic recording device on Mayotte was the first to detect the hum, though not the first one people noticed. Mark Tingay (@CriticalStress_) processed the data to create this image.

Credit: Mark Tingay

There was a hum that nobody could hear. It was a seismic event, one that originated off the coast of Mayotte on Nov. 11, a tiny island in the waters between Madagascar and Mozambique.

 

From there, it circled the entire world, though it was unusual enough (un-earthquake-ish enough) that almost no one noticed, as Maya Wei-Haas reported for National Geographic. A few people paid attention though, and that sparked a hunt for the source of the hum that, she reported, still hasn't been resolved.

 

https://www.livescience.com/64190-weird-seismic-hum.html