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Almost 80% of the world's tsunamis occur in the Pacific Ocean.

Tsunamis occur most often along countries which border the Pacific "Rim of Fire", or "Ring of Fire'. One end of this region of high sesmic and volcanic activity begins at New Zealand, heading northwest to Indonesia (completely bypassing Australia) and then west to Papua New Guinea and Indonesia, northeast along the Asian coastline, east to North America and then south along the western North American coastline.

Roughly horse-shoe shaped, the Ring of Fire extends about 40,000km long, and tsunamis can be generated anywhere along this rim.

Tsunamis occur as a result of seismic activity (earthquakes) at tectonic plate boundaries, specifically ocean trenches or mid-ocean ridges. Here, earthquakes and volcanic eruptions under the water will cause the displacement of massive amounts of water and hence a tsunami. Therefore, the Pacific Ring is always going to be a hot bed for tsunamis.

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