The Hum is persistent and invasive low-frequency humming, rumbling, or droning noise audible to many but not all people. Hums have been reported in many countries, including the United States, the United Kingdom, Australia and Canada.

This website documents and maps the self-reported data from people around the world who can hear The Hum, and also provides a serious and disciplined forum for scientific investigations and commentary.

Apr 14, 2015 · Even planets can get a bad case of tinnitus, according to a new study that explains Earth's mysterious, never-ending hum. Scientists have long known that earthquakes can make the Earth sing...

Sep 11, 2018 · The Earth's hum is the continuous oscillations of the Earth at frequencies between 2 and 20 mHz in the absence of earthquakes. The hum strongest signal consists mainly of surface waves. These seismic waves can be generated by infragravity waves propagating over a sloping ocean bottom close to the coast.

Scientists have discovered that Earth’s hum is a constant, pulsing note that’s not heard as clearly in human ears. The Earth hums due to a phenomenon known as “microseisms,” which are low-frequency, long-period seismic waves that constantly reverberate through the planet’s crust.

Apr 16, 2008 · Earth gives off a relentless hum of countless notes completely imperceptible to the human ear, like a giant, exceptionally quiet symphony, but the origin of this sound remains a mystery. Now...

Jan 11, 2019 · Earth has a song, a symphony composed of ubiquitous, continuous subtle seismic signals that thrum beneath the hustle and bustle of modern society. Scientists first observed this ambient seismic noise — everything recorded on seismograms that cannot be attributed to earthquakes — at the end of the 19th century.

Apr 17, 2015 · A strange bell-like ringing emitted by the Earth has left scientists scratching their heads for decades, but new research may have found an explanation behind this mysterious low-frequency...

Apr 7, 2025 · This low, ceaseless pulse has been referred to as Earth’s hum. First recognized in the 1990s from global sensor networks, evidence of this planetary tremor has inspired awe and intense scrutiny. Some hypothesize links between long wavelength hums and the sloshing of Earth’s liquid outer core, like waves propagating around a ringing bell.

Jun 28, 2023 · Earth’s hum turns out to be just one of the many enigmatic signals resonating in the range known as infrasound. Broadly defined as sound waves longer than 56 feet, infrasound lies below the rumbling 20-hertz bass notes at the threshold of human hearing.