foreshock

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English[edit]

Etymology[edit]

From fore- +‎ shock.

Noun[edit]

foreshock (plural foreshocks)

  1. (geology) A small earth tremor which precedes the mainshock in an earthquake sequence. Not all mainshocks have foreshocks.
  2. Any shock or disturbance which precedes an event
    • 1991, D. Roderick Kiewiet, ‎Mathew D. McCubbins, The Logic of Delegation - Page 88:
      The FY 1981 increases in defense — something of a "foreshock" to the rapid rise in defense spending over the next several years — were prompted by the fall of the Shah in Iran and the Soviet invasion of Afghanistan.

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