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| leohopkins |
 Posted: Wed Apr 02, 2008 12:24 pm Post subject: Does anyone know anything about tsunami's |
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Forum Professor
Joined: 10 Dec 2006
Posts: 1167
Location: Croydon, England
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Can anyone tell me what actually causes the phenomenon of "drawback" just before a tsunami occurs ?
Thanks 
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The hand of time rested on the half-hour mark, and all along that old front line of the English there came a whistling and a crying. The men of the first wave climbed up the parapets, in tumult, darkness, and the presence of death, and having done with all pleasant things, advanced across No Man's Land to begin the Battle of the Somme. - Poet John Masefield.
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| The Matt |
| Posted: Wed Apr 02, 2008 12:52 pm Post subject: |
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Forum Sophomore
Joined: 07 Jan 2007
Posts: 118
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| Waves on the surface of a liquid are a series of peaks and troughs. The drawback occurs when a trough reaches the coast, and a tsunami when a peak arrives. |
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| leohopkins |
| Posted: Wed Apr 02, 2008 1:44 pm Post subject: |
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Forum Professor
Joined: 10 Dec 2006
Posts: 1167
Location: Croydon, England
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Kind of makes sense, although wouldnt there be any occassions when the peak hits before the trough ?
_________________
The hand of time rested on the half-hour mark, and all along that old front line of the English there came a whistling and a crying. The men of the first wave climbed up the parapets, in tumult, darkness, and the presence of death, and having done with all pleasant things, advanced across No Man's Land to begin the Battle of the Somme. - Poet John Masefield.
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| The Matt |
| Posted: Wed Apr 02, 2008 2:02 pm Post subject: |
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Forum Sophomore
Joined: 07 Jan 2007
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| Yes. Drawbacks don't always occur. |
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| leohopkins |
| Posted: Sat Apr 05, 2008 1:44 am Post subject: |
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Forum Professor
Joined: 10 Dec 2006
Posts: 1167
Location: Croydon, England
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Okay. Thanks
_________________
The hand of time rested on the half-hour mark, and all along that old front line of the English there came a whistling and a crying. The men of the first wave climbed up the parapets, in tumult, darkness, and the presence of death, and having done with all pleasant things, advanced across No Man's Land to begin the Battle of the Somme. - Poet John Masefield.
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