"Boston will see some high tides this fall. How high? Wicked high. King tides, or "wicked high tides" as the Stone Living Lab on Boston Harbor calls them, happen when the moon's phases and orbit align perfectly. The moon's orbit around the Earth is more of an oval shape than a perfect circle, and when the moon is closest, it's in "perigee," - hence the scientific name "perigean spring tides.""
"When the moon is so much closer to the Earth than the Sun, its pull is stronger, according to the lab. Combined with a new or full moon, where the Earth, Sun, and Moon all line up, the ocean's tides are two to four feet higher than normal. The phenomenon happens predictably a few times each year, and Bostonians can experience it for themselves with the National Park Service's High Tide Trail, a walking tour along the coastline."
"The Stone Living Lab will also have high tide events at Long Wharf throughout the fall starting Thursday. See a full list of events below: September Thursday, Sept. 11, at 2:30 p.m. October Wednesday, Oct. 8, at 12:27 p.m. Thursday, Oct. 9, at 1:15 p.m. Friday, Oct. 10, at 2:05 p.m. Saturday, Oct. 11, at 2:58 p.m. November Wednesday, Nov. 5, at 10:13 a.m. Thursday, Nov. 6, at 11:01 a.m. Friday, Nov. 7, at 11:52 a.m. Saturday, Nov. 8, at 12:45 p.m."
Perigean spring tides, commonly called king tides or "wicked high tides," occur when the moon is at perigee and its phases align with the Sun and Earth. The moon's elliptical orbit brings it closer to Earth, increasing its gravitational pull and raising ocean levels. When a new or full moon coincides with perigee, tides can be two to four feet higher than normal. The phenomenon occurs predictably several times per year. The National Park Service offers a High Tide Trail walking tour along the coastline, and the Stone Living Lab will host high tide events at Long Wharf throughout the fall on listed dates.
Read at Boston.com
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