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The frequency or magnitude of earthquake activity in a given area.
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) seismic activity; the phenomenon of earthquake activity or the occurrence of artificially produced earth tremors
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(saɪzˈmɪs ɪ ti, saɪs-)

n., pl. -ties.
the frequency, intensity, and distribution of earthquakes in a given area.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


the intensity, frequency, and distribution of earthquakes in a specific area.
See also: Earthquakes
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
address seismicity. (111) Due to the private sector's superior
Oklahoma has seen a massive spike in earthquakes in the past few years, registering 2-1/2 earthquakes daily of magnitude 3 or greater - a seismicity rate 600 times greater than before 2008, according to the Oklahoma Geological Survey.
This region has the highest rates of seismicity and largest earthquakes in the Himalaya region, caused mainly by movement on thrust faults.
In its quake hazards forecast released March 28, the agency for the first time included the effects of artificially triggered seismicity. The map above shows which areas are most prone to quake damage of any severity (the far left portion of the map shows just the risks from natural earthquakes).
energy companies are starting to react to rising seismicity around the world's largest crude hub in Cushing, OK, Reuters reported.
M2 EQUITYBITES-December 16, 2015-ESG Solutions Acquires Induced Seismicity Monitoring System Specialist Spectraseis
Heightened seismic activity corresponds closely with the timeframe and location of increased drilling and hydraulic fracturing across the southwest US, according to the US Geological Survey ("Incorporating induced seismicity in the 2014 US national seismic hazard model," 2015).
Seismicity may cause significant damage to schools; the destruction can lead to tragic consequences," she said.
According to United States Geological Survey (USGS) website, no fewer than four major tectonic plates (Arabia, Eurasia, India, and Africa) and one smaller tectonic block (Anatolia) are responsible for seismicity and tectonics in the Middle East and surrounding region.
"As part of the Liverpool earth observatory, we will install a seismic monitoring network in the north west of England to monitor the seismicity."
In this paper, it is tried to evaluate the seismicity of seismic areas of Khuzestan, especially in northern part, through probabilistic seismic hazard analysis.
At present, the seismicity occurs in the crust along the WNW-ESE Sisifo fault system (Figure 1).