Key: Bold means IMPORTANT.
Answer:Simple answer: Tectonic Plates Colliding.
Side note: Seismic Waves is the first word I can think of when I think earthquakes.
Explanation:
Divergent and Convergent plate Collision causes earthquakes and what I mentioned before meant that These two types of plates Are known as tectonic plates.
Fun Fact: The earth has tectonic plates that move an inch every Year!
Tectonic Plates are pieces of the earth's crust that are almost always moving and the most tectonic plate movement's cause Volcano eruptions, earthquakes, Tsunamis and a few other Natural disasters.
