Aftershock and Tectonic movement

Aftershock noun - A tremor (or one of a series of tremors) occurring after the main shock of an earthquake.

Tectonic movement and aftershock are semantically related in earthquake topic. In some cases you can use "Tectonic movement" instead a noun "Aftershock".

Tectonic movement noun - Movement resulting from or causing deformation of the earth's crust.

Aftershock and tectonic movement are semantically related in earthquake topic. You can use "Aftershock" instead a noun phrase "Tectonic movement".