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Department of Ocean Engineering, IIT Madras, Chennai , India – 600 036
q Typically, before a tsunami, the sea will recede from the coast,
     exposing part of the seabed.
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q If the slope is shallow, this recession can exceed 800 m.
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q People unaware of the danger may stay at the
     shore, due to curiosity, but this may be a warning sign of a
     coming tsunami.
Relative size of a 10 m (33 ft) wave
Relative size of a 10 m (33 ft) wave
INITIAL WARNING