Meaning of microseism

mi•cro•seism

Pronunciation: (mī'kru-sī"zum, -sum), [key]
— n. Geol.
  1. a feeble, recurrent vibration of the ground recorded by seismographs and believed to be due to an earthquake or a storm at sea.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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