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scijinks.gov/tides

High and low tides are caused by the moon. The moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest from the moon.

tidesandcurrents.noaa.gov/est

Extremely high or low water levels at coastal locations are an important public concern and a factor in coastal hazard assessment, navigational safety, and ecosystem management. Exceedance probability, the likelihood that water levels will exceed a given elevation, is based on a statistical analysis of historic values.

science.howstuffworks.com/.../earth/geophysics/tide-cause.htm

During spring tides, the "high" tides are really high and the "low" tides are unusually low. Things get less extreme when the sun and moon sit at right angles to each other (relative to the Earth). Such an arrangement will produce a neap tide; a period in which the difference between high and low tides is minimal. When Continents Interfere

en.wikipedia.org/wiki/Tide

Low tide at the same fishing port in Bay of Fundy, 1972. Schematic of the lunar portion of Earth's tides, showing (exaggerated) high tides at the sublunar point and its antipode for the hypothetical case of an ocean of constant depth without land. There would also be smaller, superimposed bulges on the sides facing toward and away from the Sun.

news.nationalgeographic.com/news/2014/01/140130-king-tides...

Last month, coastlines saw extreme high and low tides known as king tides, which are caused by a chance alignment of the moon, Earth, and the sun. Now the tides are back. Depending on geography ...

en.wikipedia.org/wiki/Tidal_range

Tidal range is the height difference between high tide and low tide. Tides are the rise and fall of sea levels caused by gravitational forces exerted by the Moon and Sun and the rotation of Earth. Tidal range is not constant but changes depending on the locations of the Moon and Sun. The most extreme tidal range occurs during spring tides, when the gravitational forces of both the Moon and Sun ...

www.youtube.com/watch?v=7UMsEqNDZu8

As we know gravitational force is responsible for the tides in sea, But this video take a look on full story that How gravity effect sea water. ... What is the cause of High and Low Tides in Ocean ...

www.answers.com/Q/What_causes_extreme_tides

The causes of high tides and low tides are from the position of theSun, Moon, and the Earth. When the Sun, Moon, and Earth are allaligned they form Spring Tides. Spring Tides are high tides.

www.physlink.com/Education/AskExperts/ae338.cfm

What causes high tide and low tide and why? Asked by: Jen Kinsey Answer The high and low tide are caused by the gravitational forces between the earth and the moon. However, the source of the real effect takes some explaining to grasp. The incorrect way of thinking is that the moon attracts all the water to itself, therefore causing a high tide ...

www.youtube.com/watch?v=sMKvqMUZwV4

GoPro Timelapse of change from ultra-low (greater than -5 ft) tide to high tide at Tutka Bay Lodge dock, Tutka Bay, Alaska.