Answer:
Smaller earthquakes that precede the main-shock are called Foreshocks.
Step-by-step explanation:
Foreshocks are earthquakes that lead to larger earthquakes in the same area. An earthquake cannot be identified as a foreshock at first. After a larger earthquake in the same area occurs, then it can be identified as a foreshock.
Only 1 Earthquake: Not a Foreshock
1 small Earthquake and then a bigger Earthquake: Foreshock.
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