earthquake aftershocks
a small earthquake that follows the main earthquake
A small earthquake that follows the main earthquake.
An aftershock is a small earthquake that follows the main earthquake, while a foreshock is a small earthquake that often precedes, leads to, a major earthquake.
Not always
is a small earthquake that often precedes a major earthquake
it is small.
An earthquake is called an earthquake no matter whether it is small or large. An earth tremor is just a general term used by people to describe a small earthquake.
Small foreshocks that precede a major earthquake can occur
Most small earthquakes are just background seismicity. There is no way to tell whether a small event will be followed by a larger one. But if there is a larger earthquake afterwards, the first earthquake is called a "foreshock"
Is a small earthquake that often precedes a major earthquake.
it is actually small.