Oleg Zabluda's blog
Saturday, November 12, 2016
 
Supermoon Forecast: The Moon Hasn't Been This Close in Almost 69 Years
Supermoon Forecast: The Moon Hasn't Been This Close in Almost 69 Years
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On Monday (Nov. 14) at 3:15 a.m. PST, the moon will arrive at its closest point to the Earth in 2016: a distance of 221,524 miles (356,508 kilometers) away. This distance, which is measured from the center of the Earth to the center of the moon, is within 85 miles (137 km) of the moon's closest possible approach to Earth; to be sure, this is an extreme perigee.

Two hours and 37 minutes after perigee (the moon's closest point to Earth), the orb will officially turn full. [...5:52 a.m. PST on Nov. 14...] this month's full moon [...] will be the closest since Jan. 26, 1948.

The full moon won't approach this close again until November 2034, although there were even closer full moons in January 1912 and January 1930.
[...]
Dramatic tides
[...]
Such an extreme tide is known as a perigean spring tide, where the word "spring" is derived from the German springen, "to spring up," and is not a reference to the spring season.

Actually, every month, "spring tides" occur when the moon is full and new. [...] "Neap tides," on the other hand, occur when the moon is at first and last quarter [...] Tidal forces vary as the inverse cube of an object's distance. This month the moon is 14 percent closer at perigee than at apogee, and so it exerts 48 percent more tidal force during the spring tides of Nov. 14 than during the spring tides near apogee two weeks before and after.
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http://www.space.com/34660-closest-supermoon-full-moon-in-69-years-forecast.html
http://www.space.com/34660-closest-supermoon-full-moon-in-69-years-forecast.html

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