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This model assumes that waves vary in a regular way around the average (so-called 'significant') wave height. In a storm sea with a significant wave height of 12 metres (39.4 ft), the model suggests there will hardly ever be a wave higher than 15 metres (49.2 ft). One of 30 metres (98.4 ft) could indeed happen â but only once in ten thousand years (of wave height of 12 metres [39.4 ft]).
Wave heights of 15 m (50 ft) at that site suggest that the tsunami waves may have been unusually high, 15 to 30 m, along the entire 100-km stretch of coast from Kreung Sabe to the northwest tip of the island.