On Tuesday, a powerful 8.8 magnitude earthquake rocked the area around Russia's Kamchatka Peninsula, resulting in tsunami warnings being issued around the world. From Hawaii to Japan and the B.C. coast to Chile and Australia, people were warned that high water could inundate their coastlines.

Many people remember the deadly 2004 Boxing Day tsunami, which followed a 9.1 magnitude earthquake off the coast of Sumatra, Indonesia. More than 280,000 people died, and more than one million people were displaced in south Asia and east Africa.

Another memorable and tragic earthquake and tsunami was the Tohoku event in 2011, which forced the shutdown of Japan's Fukushima nuclear power plant and killed more than 15,000 people.

Clearly, tsunamis occur, but how often and how dangerous can they be? He

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