noun. A quake of lesser magnitude, usually one of a series, following a large earthquake in the same area.

noun. A further reaction following the shock of a deeply disturbing occurrence or revelation.

noun. An earthquake that follows in the same vicinity as another, usually larger, earthquake (the "mainshock").

noun. By extension, any result or consequence following a major event.

noun. a tremor (or one of a series of tremors) occurring after the main shock of an earthquake

"The magnitude 5.8 earthquake that struck Virginia on Tuesday gives new meaning to the word "aftershock.""

earth tremor  microseism  tremor  

aftershocks  outstation  prospecting  updater