microseism

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mi·cro·seism

 (mī′krə-sī′zəm)
n.
A faint earth tremor caused by natural phenomena, such as winds and strong ocean waves.

mi′cro·seis′mic (-sīz′mĭk, -sīs′-) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

microseism

(ˈmaɪkrəʊˌsaɪzəm)
n
(Geological Science) a very slight tremor of the earth's surface, thought not to be caused by an earthquake
microseismic, ˌmicroˈseismical adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

mi•cro•seism

(ˈmaɪ krəˌsaɪ zəm, -səm)

n.
a feeble recurrent vibration of the ground recorded by seismographs and believed to be due to an earthquake or a storm at sea.
[1885–90; micro + Greek seismós earthquake (see seismic)]
mi`cro•seis′mic, mi`cro•seis′mi•cal, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

microseism

an almost imperceptible earth tremor caused by a violent sea storm or an earthquake and detected only by a microseismometer. — microseismic, adj.
See also: Earthquakes
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.microseism - a small earthquakemicroseism - a small earthquake      
earthquake, quake, seism, temblor - shaking and vibration at the surface of the earth resulting from underground movement along a fault plane of from volcanic activity
aftershock - a tremor (or one of a series of tremors) occurring after the main shock of an earthquake
foreshock - a tremor preceding an earthquake
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