Scientists capture Earth’s “hum” on ocean floor
Scientists have long known earthquakes can cause the Earth to vibrate for extended periods of time. However, in 1998 a research team found the Earth also constantly generates a low-frequency vibrational signal in the absence of earthquakes.
Since then, seismologists have proposed different theories to explain the existence of this continuous vibration, from atmospheric disturbances to ocean waves moving over the sea floor. They’ve also measured the vibration using seismometers on land, but had not yet successfully measured it at the sea floor, which could help scientists better quantify the sources of the vibrations....more
-- Joseph Cariz,
- Article Category
- Research Letters
- Solid Earth
First Observation of the Earth's Permanent Free Oscillations on Ocean Bottom Seismometers
- First Published:
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