New theory of deep-ocean sound waves may aid tsunami detection

Researchers have now identified a less dramatic though far more pervasive source of acoustic-gravity waves: surface ocean waves, such as those that can be seen from a beach or the deck of a boat. These waves, known as surface-gravity waves, do not travel nearly as fast, far, or deep as acoustic-gravity waves, yet under the right conditions, they can generate the powerful, fast-moving, and low-frequency sound waves.

from Oceanography News -- ScienceDaily http://ift.tt/1oKUWjk
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