A shaking of the Earth that is either tectonic or volcanic in origin or caused by collapse of cavities in the Earth. A tectonic earthquake is caused by fault slip.
Motion on a fault that generates more or less strong shaking on the ground surface.
Mouvement sur une faille qui génère des secousses plus ou moins fortes à la surface du sol.
wats
Tremblement de terre
Earthquake
Séisme
Sismologie