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Originally posted by Blaine91555
Scientists Track Down Source of Earths Hum
When two waves of opposite direction but similar frequency collide, they create a special kind of pressure wave that carries energy to the ocean bottom. As these waves pound against the sea floor, they generate a constant vibration with a frequency of about 10 millihertz, much too low for humans to hear but easily detectable with seismometers. By comparing the intensity of the hum with the height of waves around the world, scientists can track where the buzz is coming from.
Further study of the Bloop is hampered by the fact that it has not been heard since the summer of ‘97.