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#14
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03-24-2011, 07:52 PM
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Re: Lost City of Atlantis, Swamped by Tsunami, May Be Found
Interestingly, tidal waves are not waves, but, rather, the actual level of the sea rising in a very broad area. Tidal waves are commonly caused by the alignment of the sun and the moon, or from weather-related phenomena. Those that are produced by tropical cyclones can be devastating. For instance, a hurricane can produce surface waves of up to 50 feet in open sea, and a storm surge of 20 feet (a tidal wave). The waves ride atop the storm surge, hence, theoretically, can reach 70 feet. What that means is this: the waves are no more than steep ridges and troughs upon the surface of the water, which quickly dissipates upon reaching the shore. But the level of the sea, or storm surge (tidal wave), can make it far inland, and in many cases, depending upon the elevation above sea level, for several miles. So, yeah, a 20 foot tidal wave can wipe out an entire coastline (the record is 28 feet, produced by Hurricane Katrina, August, 2005). Tsunamis are similar to tidal waves, but the two differ profoundly in their origins. |
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#15
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03-24-2011, 08:06 PM
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Re: Lost City of Atlantis, Swamped by Tsunami, May Be Found
Well the 10 story tsunami isn't even the largest. There are many different tsunamis listed as the largest when I searched but there was one that rushed past Ishigaki Island, Japan, in 1971 that was recorded at 84.7 meters (278 feet) high. And 10 stories is roughly 100' right? So it is feasible.
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#16
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03-24-2011, 08:23 PM
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Re: Lost City of Atlantis, Swamped by Tsunami, May Be Found
Actually, I remember in school we read about a tsunami in Alaska that supposedly, combined with surface waves, reached a height of 1700 feet. I don't know if it's ever been confirmed, but that's what we learned in our geography class.
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#18
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03-24-2011, 08:45 PM
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Re: Lost City of Atlantis, Swamped by Tsunami, May Be Found
I dunno about those things. I grew up near the tidal Potomac River. Now Washington, DC, is about 75 miles upriver from where the Chesapeake Bay empties into the Atlantic Ocean. And yet, even on clear days, when it hasn't rain for weeks, we can have flooding near the shore, due to the effects of the combined sun, moon and the wind. Amazing to see that.
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