seismic – adj. relating to or caused by an earthquake

geological – adj. relating to the study of rocks, soil and the physical structure of the Earth

tremble – n. to shake

confident – adj. certain about one's ability to do things well

fault – n. a crack in the Earth's crust

tectonic plates – n. plates that make up the surface of the Earth

crust – n. hard, dry layer on the surface of something

interior – n. the inside part of something