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