The other answer is wrong When a large earthquakes is followed by smaller ones, the small ones are called AFTERSHOCKS Hope this helps!
The earth is still at a place where the tectonic plates were not settled and were still slightly moving
After a large earthquake, smaller earthquakes known as aftershocks occur as the Earth's crust adjusts to the stress changes caused by the main event. These aftershocks are generally smaller than the original quake but can still cause damage. They can happen for days, weeks, or even months following the main earthquake, decreasing in frequency and intensity over time.
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