The most common natural causes of landslides include volcanic eruptions, seismic vibrations from earthquakes, erosion beneath banks or cliffs and increases in pore water pressure. Human causes include deforestation, alte... More »

Landslides occur throughout the entire United States, but are more prevalent in certain areas of Hawaii and Alaska and in the Rocky Mountains, Appalachian Mountains and the Pacific Coastal Ranges. Landslides are most lik... More »

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Tsunamis happen when earthquakes, landslides or volcanic eruptions disturb the ocean floor. Most tsunamis occur when there are earthquakes at tectonic plate boundaries. When the ocean floor at the boundary rises or falls... More »

www.reference.com Science Earth Science Tsunamis

Tsunamis happen when earthquakes, landslides or volcanic eruptions disturb the ocean floor. Most tsunamis occur when there are earthquakes at tectonic plate boundaries. When the ocean floor at the boundary rises or falls... More »

www.reference.com Science Earth Science Tsunamis

Tsunamis are formed by violent underwater earthquakes, landslides, volcanic eruptions, and, rarely, meteor impacts. These events cause sudden and drastic displacement of water, forming massive waves in the process. More »

www.reference.com Science Earth Science Tsunamis

Some examples of destructive forces include erosion by water or wind, volcanic activity, earthquakes, the impact of glaciers and even animals' degradation of the environment. Silt and soil deposition, as well as volcanic... More »

There are many different causes for natural disasters; seismic activity, air pressure, ocean currents and soil erosion are the main causes. A natural disaster can cause damage to property, loss of life and effect the eco... More »