At 05:41 pm Bob Myers 16/12/99 -0800, you wrote: >Matt, > >You don't understand tides in the least if you believe this. > >Consider the question: why are there 2 lunar tidal bulges, >one on each side of the Earth? If it's just simple matter of the >Moon "pulling" on one side, why the bulge on the opposite side? >Tides are usually every 12 hours, not every 24. Except the places where there is one tide every 24 hours. Personally I think the "slosh" effect is the best term and/or way of visualising these abberations. A shallow tray with the opposite ends being alternatively lifted to get the water to slosh back and forth. Dependant on the natural cyle, the "tuning" of the length of the tray versus the timing of the gravitational tides as to whether and what happens. The diagrams in books so often conveniently forget that there are continents, bays and islands complicating the whole thing. Around our bit of coast, about 300 miles of it there is only one spring tide a month and the tidal heights each day make a very ragged graph. Nothing is quite that simple if you want to get down to definitive causes. There are 3 major causes and a mass of minor ones if you want to calculate actual times and heights. NIWA have a good WEB site with movies of tides, I'll track it down if anyone is interested. >And please take your spurious earthquake prediction speculations >to some place where it is on topic. This is not the right >forum to discuss this, even if there was the slightest merit >to your uninformed suggestions. Very good series on TV at the moment, "The Planets", you should see what gravitational effects do to some of the moons around planets in the solar system!!! Alex . . Alex (Sandy) Ferguson Chemistry Department University of Canterbury New Zealand *************************************************************************** PaddleWise Paddling Mailing List - All postings copyright the author and not to be reproduced outside PaddleWise without author's permission Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Mon Dec 20 1999 - 12:28:19 PST
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