mainshock
Noun
Meaning
mainshock (plural mainshocks)
(geology) The largest earthquake in a sequence, sometimes preceded by foreshocks and almost always followed by aftershocks which are of lesser intensity.
Anagrams
Examples
In the first three days after the mainshock, dozens of aftershocks flared.
The cross-section shows the location of the mainshock and aftershocks, (1/2) pic.