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大鳴門橋鳴門漩渦 (Great Naruto Bridge) (Naruto whirlpools)

大鳴門橋鳴門漩渦 (Great Naruto Bridge) (Naruto whirlpools)

The Naruto whirlpools (鳴門の渦潮, Naruto no Uzushio) are tidal whirlpools in the Naruto Strait, a channel between Naruto in Tokushima and Awaji Island in ...
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The Naruto whirlpools (鳴門の渦潮, Naruto no Uzushio) are tidal whirlpools in the Naruto Strait, a channel between Naruto in Tokushima and Awaji Island in Hyōgo, Japan. The strait between Naruto and Awaji island has a width of about 1.3 km (0.81 miles). The strait is one of the connections between the Pacific Ocean and the Inland Sea, a body of water separating Honshū and Shikoku, two of the main islands of Japan. The tide moves large amounts of water into the Inland Sea twice a day and also removes large amounts of water twice a day. With a range of up to 1.7 m (5.6 ft), the tide creates a difference in the water level of up to 1.5 m (4 ft 11 in) between the Inland Sea and the Pacific. Due to the narrowness of the strait, the water rushes through the Naruto channel at a speed of about 13–15 km-h (8–9 mph) four times a day, twice flowing in and twice flowing out. During a spring tide, the speed of the water may reach 20 km-h (12 mph), creating vortices up to 20 m (66 ft) in diameter.
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