[ sahyz-mis-i-tee, sahys- ]
/ saɪzˈmɪs ɪ ti, saɪs- /

noun, plural seis·mic·i·ties.

the frequency, intensity, and distribution of earthquakes in a given area.

Origin of seismicity

First recorded in 1900–05; seismic + -ity Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for seismicity

British Dictionary definitions for seismicity


/ (saɪzˈmɪsɪtɪ) /


seismic activity; the phenomenon of earthquake activity or the occurrence of artificially produced earth tremors
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for seismicity


[ sīz-mĭsĭ-tē ]

The frequency or magnitude of earthquake activity in a given area. Global seismicity maps show that the regions where seismicity is the highest correspond with the edges of the tectonic plates.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.