Wave Periods (Oceanography) Wind generates waves that have a wide range of periods, it is responsible for pure capillary waves (ripples), which have periods less than 0.1 second, and for most gravity waves, which have periods from 0.1 second to approximately 30 seconds. Wind-driven gravity waves contain, on the average, more energy than waves of any other period. Seas (waves being actively generated by the wind during a storm) have periods of 4–10 seconds, and swells (waves that have radiated from the wind storm) have periods of 10–30 seconds. Wind storms are also responsible for waves with periods longer than 30 seconds, these storms excite Seiches (standing waves that do not move forward but instead move up and down) whose typical periods range from 5–10 minutes, and storm surges (large waves having periods from 1–100 hours).
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