Editing Foreshock (section)

{{short description|Earthquake that occurs before a mainshock but is of lower magnitude}}
{{Earthquakes}}

A '''foreshock''' is an [[earthquake]] that occurs before a larger seismic event{{snd}}the [[mainshock]]{{snd}}and is related to it in both time and space. The designation of an earthquake as ''foreshock'', ''mainshock'' or [[aftershock]] is only possible after the full sequence of events has happened.<ref name="Gates">{{cite book|last1=Gates|first1=A.|last2=Ritchie|first2=D.|title=Encyclopedia of Earthquakes and Volcanoes|url=https://books.google.com/books?id=b1sXfJCiCHQC&dq=foreshock+earthquake&pg=PA89|year=2006|publisher=Infobase Publishing|isbn=978-0-8160-6302-4|page=89|access-date=29 November 2010}}</ref>