4. Occurred along the subduction zone where the Indian dives under the Eurasian Plate http://www.nps.gov/prsf/geology/images/plates.gif
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7. A tsunami (pronounced soo-NAA-mee) is a series of waves (called a "wave train") generated in a body of water by a pulsating or abrupt disturbance that vertically displaces the water column.
8. Tsunami's are also mistakenly referred to as tidal waves as they often resemble a tide that keeps rising, rather than cresting waves when they reach shore. However, as they are not actually related to tides the term may be misleading, and its use is discouraged by scientists.
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12. Warning Systems Many countries around the Pacific, including Hawaii, have warning systems and evacuation procedures in the event of a serious tsunami.