Earthquakes and Tsunamis

By: Addie Jo Welch


Earthquakes are vibrations caused by movement along fractures in the crust. Earthquakes usually occur when rocks fracture or break deep in Earth.

Types of Waves

March 11, 2011

There was a terrible Earthquake in Japan in March of 2011.


Tsunamis are gravity waves created by rapid displacement of a water column. Tsunamis can come from earthquakes, landslides, or volcanic eruptions. When the wavelengths hit shallow water, they build up amplitude and become up to hundreds of meters high.