Global distribution of earthquakes and volcanoes
The earth's surface is made up of two types of crust:
- The surface of the Earth's crust found underneath the oceans, forming the ocean floor. - found underneath the oceans. It is denser than continental crust and can be subducted.
- The surface of the Earth's crust found underneath large land masses. - found under land masses or continents. It is generally older than oceanic crust and is less often destroyed.
Earthquakes are found along all types of The region where two or more tectonic plates meet. It is a zone of intense seismic activity. as shown on this map. Volcanoes however, only occur at constructive and destructive plate margins.
Hawaii is an arc of volcanic islands, found above a hot spot.