Multiple choice

Which of these is an earthquake that occurs before a larger seismic event?

  1. Earthquake storm

  2. Earthquake swarms

  3. Foreshock

  4. Remotely triggered earthquakes

  5. Shear wave splitting
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A foreshock is an earthquake that occurs before a larger seismic event (the main shock) and is related to it in both time and space. The designation of an earthquake as fore shock, main shock or after shock is only possible after the event.

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