aftershock
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aftershock
one of a series of minor tremors occurring after the main shock of an earthquake
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
aftershock
[′af·tər‚shäk] (geophysics)
A small earthquake following a larger earthquake and originating at or near the larger earthquake's epicenter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.