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An earthquake originating under the sea floor.

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.


(Geological Science) obsolete an agitation and disturbance of the sea caused by an earthquake at the sea bed. It is now usually described as an earthquake
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014



an agitation of the sea caused by a submarine eruption or earthquake.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.seaquake - an earthquake at the sea bed
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
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References in periodicals archive ?
In addition, the effect of seaquake is much more complex, which can induce hydrodynamic pressures acting on the cable [7, 8].
(1985) Short communication: a damaging seaquake. Earthquake Eng.
The adventures get under way as a powerful artificial seaquake strands a research team in an undersea lab, and the crew of the Thunderbirds must determine who caused it.
When the collision is under a seabed that is relatively far from a land mass, it creates a seaquake or tsunami, which nonetheless can affect the nearest land mass."
Experts believe they may have been affected by a seaquake off the Norwegian coast on August 30 or the operations of a ship carrying out seismic tests off Aberdeen.
Scientists think the seaquake off Norway on August 30 may have made the mammals veer off course.