National Geographic magazine has many images of the wreckage caused by tsunamis around the world. Its tsunami photo gallery includes photographs of the disasters in Sri Lanka, Chile and the Indian Ocean. More »

Tsunamis usually occur when earthquakes take place underneath the ocean at tectonic plate boundaries, or when volcanic eruptions or landslides take place in the ocean. Underwater earthquakes cause the ocean floor to fall... More »

The height of a tsunami is determined by the depth of water at the point where it starts. Tsunami wave heights of up to 50 feet have been recorded, according to Wikipedia. More »

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Tsunamis are measured by their runup,which is the difference between an observed sea level and the distance the tsunami waters reach on shore. This is generally measured once the danger has passed, so debris and destruct... More »

According to the National Oceanic and Atmospheric Administration, tsunamis are a naturally occurring part of Earth's climate and can't be prevented. The best course of action people can take when dealing with tsunamis is... More »

Tsunamis are caused by undersea volcanoes or earthquakes that push massive amounts of energy through the water. Earthquakes are the most common cause, but landslides can create tsunamis as well. More »

The formation of a tsunami is a direct result of underwater earthquakes. The energy released during underwater earthquakes is transferred to the water, moving it upward and creating huge waves. More »