Earth's most mysterious hums, ranked
Our planet makes a lot of sounds, and some of them are spooky.
By Rachel Feltman December 11, 2017
When all else is quiet, Earth still hums. Scientists have known about this low-frequency droning for years, but last month researchers published the first-ever study to record the not-so-noisy noise on the bottom of the ocean. The paper presents some interesting findings on the hum and its frequencies—the planet’s oscillation clocks in between 2.9 and 4.5 millihertz, which is 10,000 times lower than sounds humans are capable of hearing—but at the end of the day, this vibration is just that: a vibration. The main benefit of this research, Ryan F. Mandelbaum pointed out for Gizmodo, is that scientists could pick up a lot of interesting seismological data in the course of studying the hum. Perhaps one day we could analyze it to learn something about the planet’s core, but we’re not there yet.
https://www.popsci.com/earth-mysterious-hum-unexplained-sounds
