The earth below our feet is continually moving. How do changes underground lead to effects on the surface, and what happens to change these movements into devastating earthquakes?
- Movement of the Earth's tectonic plates causes earthquakes.
- Earthquakes occur at plate boundaries known as fault lines.
- The focus of an earthquake is the point at which pressure is released. Directly above this is the epicentre.
- Seismic waves are measured on the Richter Scale, which determines the magnitude of an earthquake.