seven tide swings in one afternoon - SailNet Community
 
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post #1 of 9 Old 10-31-2008 Thread Starter
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seven tide swings in one afternoon

A tsunami in Maine? Perhaps it was aliens? Maybe a right-wing plot to suppress votes in the ever-pivotal Mid Coast Maine region. Whatever it was, this is just weird:

Put mouse pointer here and depress index finger

S/V Gracie
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post #2 of 9 Old 11-01-2008
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Sounds like a very small, localized tsunami.

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post #3 of 9 Old 11-01-2008
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Hmm... wonder if the event that caused this also caused the rogue wave that rolled FreeFall in the recent USCG rescue. The timing is pretty close to right for this to have been the case.

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post #4 of 9 Old 11-01-2008
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There is a river flowing into Lake Ontario near Trenton that has multiple tides in one day when there is a strong wind blowing in the right direction.There have been 28" tides every three to four hours.Sometimes visiting boats are left hanging from the dock as no one expects it.
I think it is called a seiche.Water levels are pushed up by the wind then gravity forces them back to the lake.

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post #5 of 9 Old 11-01-2008
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There be mysteries in the deep!!
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post #6 of 9 Old 11-01-2008
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This sounds very similar to a meteorological gravity wave, or "Rissaga" wave, which I described here at post #875:

Tell me what place is this...


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post #7 of 9 Old 11-01-2008 Thread Starter
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Quote:
Originally Posted by JohnRPollard View Post
This sounds very similar to a meteorological gravity wave, or "Rissaga" wave, which I described here at post #875:

Tell me what place is this...
Hmmm. Interesting stuff. Here's a vid with more pics of the same Rissaga:

Does one embed a video just like a photo?

S/V Gracie
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post #8 of 9 Old 11-01-2008
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Thanks John and all, More stuff I didn't know about!!!
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post #9 of 9 Old 11-02-2008
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There's a good comment on the linked page that gives several plausible reasons, and I personally sense that a "slope slump" sounds reasonable. See if there are underwater cliffs or steep drop-offs that correspond to the area affected.
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