A sudden shaking of the ground caused by movement of Earth’s crust.
Earthqual
A break or crack in Earth’s surface where earthquakes often happen.
fault line
The thin, outer layer of the Earth.
crust
A large piece of the Earth’s crust that moves slowly.
plate
A wave of energy caused by a sudden movement underground.
shockwave
The point deep underground where an earthquake begins.
focus
The point on Earth’s surface directly above the focus of an earthquake.
epicenter
A giant ocean wave caused by an underwater earthquake.
tsunami
A machine that measures the strength of earthquakes.
seismograph
When large amounts of earth or rock suddenly fall down a hill or mountain.
landslide
Currently moving or capable of movement or change (such as a fault).
active
Harm or injury that makes something less useful or ruins it.
damage
