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Why Does the Earth Hum?

Ocean Wave Reverberation

What is Earth’s Hum?

Even without earthquakes, seismometers constantly record seismic energy. They record periods of oscillations about every 6 seconds as background noise.

Earth hum was once thought to be very mysterious in nature. It went unexplained for decades. But now scientists discovered that these oscillations are due to ocean waves constantly crashing into continents.

Ocean waves pound continents vibrating like a bell. Then land masses shake back and forth like a metronome. And during storms, it worsens as the reverberations are amplified.

So, let’s get started with Earth hum. Because even when it’s silent, there’s a bit of background noise reverberating.

Low-frequency background noise

Earth Background Noise

Humans are unable to hear Earth’s hum because it ranges between 2.9 and 4.5 Mhz. In general, humans can hear anything from 20 Hz to 20 kHz.

So, this means that Earth’s hum is about 10,000 times lower than what we are capable of hearing. That’s why we need special seismometers to detect this ultra-low frequency.

There have been claims that submarine activity and hidden military operations caused this low-frequency noise. But in 1998, this phenomenon has been attributed to ocean waves pounding the edge of continents.

Like the reverberations of a bell, scientists have clearly listened to Earth’s hum. By installing seismometers in the Indian Ocean, they gathered signals from the ultra-low frequency sound to conclude where it was coming from.

Why Does the Earth Hum?

Do you ever wonder what Earth sounds like? Scientists have discovered that Earth’s hum is a constant, pulsing note that’s not heard as clearly in human ears.

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  1. I’ve often wondered if I was just a little nutty to think it was the Earth’s sound or pulse I was feeling and hearing. I don’t know what took me so long to check if it was just me or if it was in fact something others have experienced. So the Earth is indeed living. More reason to take good care of it. 😊

  2. To me, this seems a rhythm rather than a hum – is this hum different from the Schumann Resonance? or is there an entire concert going on that we are only now becoming aware of because of our inquiry and instruments?

  3. People may not hear the hum, but sensitive people can tune in and feel that frequency in their body.

  4. “this means that Earth’s hum is about 10,000 times lower than what we are capable of hearing”

    I disagree. I live in a rural area about an hour and a half from the ocean where the waves crash and I can hear the earth’s “hum”, or natural frequency. It’s very peaceful.

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