SAN MIGUEL CUEVAS, Mexico _ Unrelenting as the lunar tides, economic and cultural forces keep pushing this town's native sons north and pulling them home again.
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Indeed, British researchers in 2006 discovered a correlation between lunar tides ( caused by gravitational pull ) and variances in flow speed of the Rutland Ice Stream in Antarctica.
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A few shallow moonquakes with hypocenters located about 100 km below the surface have also been detected, but these occur more infrequently and appear to be unrelated to the lunar tides.
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At landfall, the hurricane brought a storm surge of over to a large area of coastline, producing severe coastal damage; the damage was greater since the hurricane coincided with the highest lunar tide of the year.
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Owing to the Moon's orbital progress, it takes a particular point on the Earth ( on average ) 24 hours, 50.5 minutes to rotate under the Moon, so the time between high lunar tides fluctuates between 12 and 13 hours.
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In the last 15 years, he has pinpointed the time and place of the rendering of art masterpieces, given new interpretations of astronomical references in Chaucer and revealed the decisive role of the moon ( and lunar tides ) in military and other encounters.
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The size of the lunar tide compared to the solar tide ( which comes once every 12 hours ) is generally about 2 to 1, but the actual proportion along any particular shore depends on the location, orientation, and shape of the local bay or estuary.
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And across the salt marshes of Connecticut and Long Island, an unusually high lunar tide in June left pools of water far from the reach of fish that feed on larvae, producing a huge crop of salt-marsh mosquitoes-- the largest, the fiercest, and the thirstiest for human blood.
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When applied to men, it carries a feminine overtone : The writer Peggy Noonan told Maureen Dowd of The New York Times in 1991 of White House aides " who are utterly at the mercy of the lunar tides and utterly affected by the vapors and by an almost feline desire to look man to man at one's enemy and scratch his little eyes out ."
