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1. A quake of lesser magnitude, usually one of a series, following a large earthquake in the same area.
2. A further reaction following the shock of a deeply disturbing occurrence or revelation: "The industry continued to reel from aftershocks of a disastrous [year]" (David Lake).
(Physical Geography) one of a series of minor tremors occurring after the main shock of an earthquake. Compare foreshock
af•ter•shock(ˈæf tərˌʃɒk, ˈɑf-)
1. a small earthquake or tremor that follows a major earthquake.
2. the effect or repercussion of an event; aftermath.
A less powerful earthquake that follows a more forceful one. Aftershocks usually originate in the same place as the main earthquakes they follow.