Quote that explains their finding: "Researchers claim that microseismic activity from long ocean waves impacting the sea bed is what makes our planet vibrate a

Quote that explains their finding: "Researchers claim that microseismic activity from long ocean waves impacting the sea bed is what makes our planet vibrate and produces the droning sound. The pressure of the waves on the seafloor generates seismic waves that cause the Earth to oscillate. [...] The continuous waves produce sounds lasting from 13 to 300 seconds. They can be heard by a relatively small proportion of people – who are sensitive to the hums – and also by seismic instruments."