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Tsunami Disturbs Earth's Rotation
Massive Quake, Tsunamis Kill Thousands in South Asia
More Than 11,000 Dead in Seven Countries as Tidal Waves Slam Coasts http://aolsvc.news.aol.com/news/article.adp?id=20041225210109990003 ....authorities sorted out a far-flung disaster caused by the 9.0-magnitude earthquake, strongest in 40 years and fourth-largest in a century. ''All the planet is vibrating'' from the quake, said Enzo Boschi, the head of Italy's National Geophysics Institute. Speaking on SKY TG24 TV, Boschi said the quake even disturbed the Earth's rotation. [post not intended to minimize the tragic loss of life] |
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''All the planet is vibrating'' from the quake, said Enzo Boschi, the head
of Italy's National Geophysics Institute. Speaking on SKY TG24 TV, Boschi said the quake even disturbed the Earth's rotation. In what way was it disturbed? He doesn't elaborate. The disaster should make mainstream headlines soon. |
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''All the planet is vibrating'' from the quake, said Enzo Boschi, the head
of Italy's National Geophysics Institute. Speaking on SKY TG24 TV, Boschi said the quake even disturbed the Earth's rotation. Apologies for the original topic. The quake is what he claims disturbed our rotation, not the tsunami. Interesting that it happened near Full Moon. Here's a site discussing our sun and moon's gravitational pull's potential for triggering earthquakes: http://www.freewebz.com/eq-forecasting/128.html |
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Chris L Peterson:
Earthquakes, tsunamis, tides, and winds all disturb the Earth's rotation. Their effects are largely unpredictable, and time references are adjusted following actual measurement of the Earth's rotation period. Indeed. I recall reading that the opeation of the massive Rance Estuary tidal generating station in France slows the rotation of the Earth by a very tiny, but measurable amount. Davoud -- usenet *at* davidillig dawt com |
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"SaberScorpX" wrote in message ... Massive Quake, Tsunamis Kill Thousands in South Asia More Than 11,000 Dead in Seven Countries as Tidal Waves Slam Coasts http://aolsvc.news.aol.com/news/article.adp?id=20041225210109990003 ...authorities sorted out a far-flung disaster caused by the 9.0-magnitude earthquake, strongest in 40 years and fourth-largest in a century. ''All the planet is vibrating'' from the quake, said Enzo Boschi, the head of Italy's National Geophysics Institute. Speaking on SKY TG24 TV, Boschi said the quake even disturbed the Earth's rotation. So that's why my GOTO mount was slightly off last night! -- md 10" LX200GPS-SMT ETX105 www.xs4all.nl/~martlian |
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...the load created by a large mass of water may be asymmetric on a
fault, whereas direct gravitational loading is going to look virtually identical on both sides of a fault. The direct gravitational load on 'both' sides of a fault would seem to easily vary with Earth's rotation. The stress would not only be E-W / N-S, but an overall pushing and pulling at depth layers as well. I know there are two schools, gravitational effects vs. tidal influence. Looks like they are both contributors, to whatever degree. In any case, it's another major earthquake occurring near apogee/perigee. |
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On 27 Dec 2004 17:16:12 GMT, (SaberScorpX) wrote:
The direct gravitational load on 'both' sides of a fault would seem to easily vary with Earth's rotation. The stress would not only be E-W / N-S, but an overall pushing and pulling at depth layers as well. Faults are small structures. There is no way that gravitational or tidal forces can produce significant differential forces across them, and differential forces are what you need to increase the strain and possibly trigger an earthquake. This is born out by statistical analyses of thousands of earthquakes, which have shown no correlation between tides or solar and lunar position and the time of earthquake occurrence for inland faults located more than a few miles from the coast. There is a strong correlation between tide and time of occurrence for earthquakes occurring on undersea faults, however, presumably because of the direct tidal effect of water mass. I know there are two schools, gravitational effects vs. tidal influence. I'm not aware of any serious researchers who consider gravitational or direct tidal influence to have any bearing on when earthquakes occur. Gravitational forces are an important part of plate tectonic models, but earthquakes are seldom associated directly with plate-to-plate interactions. In any case, it's another major earthquake occurring near apogee/perigee. Yes, in this case it was an undersea fault that broke, so it may fit nicely with the correlation to tides. _________________________________________________ Chris L Peterson Cloudbait Observatory http://www.cloudbait.com |
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On 27 Dec 2004 05:10:29 GMT, Uncle Bob
wrote: Chris L Peterson wrote: On 27 Dec 2004 04:21:10 GMT, (SaberScorpX) wrote: Earthquakes, tsunamis, tides, and winds all disturb the Earth's rotation. Their effects are largely unpredictable, and time references are adjusted following actual measurement of the Earth's rotation period. Well, we'd better get on it, then. I may have to adjust the RA trimmer pot on my CG5 mount. Uncle Bob _________________________________________________ ______________________________ Posted Via Uncensored-News.Com - Accounts Starting At $6.95 - http://www.uncensored-news.com The Worlds Uncensored News Source ************** The NBS has been adding a leap second every Dec 31 for the past ten to fifteen yrs that I can remember. It already is well known that the Earth's rotation is slowing down by about one second each year. At best this quake may h ave slowed down the Earth's rotation be a few milliseconds to a second at most. We shouls know withing a few months to the exact amount if there was any. james |
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SaberScorpX wrote:
I know there are two schools, gravitational effects vs. tidal influence. Looks like they are both contributors, to whatever degree Statistical analysis shows that there is no significant difference between lunar syzygy and lunar quadrature with respect to earthquake occurrence. Or, if you prefer, it shows that all earthquakes occur within about 7.5 days of lunar syzygy. Best, Stephen Remove footfrommouth to reply -- + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + Stephen Tonkin | ATM Resources; Astro-Tutorials; Astro Books + + (N51.162 E0.995) | http://astunit.com + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + |
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