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Old December 4th, 2005, 11:13 PM   #21
mtb_nz
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Quote:
Originally Posted by Urban Dave

Compare the weigh of a bilding with a small mountain or so. It's impossible that a building could make earthquake.
I’m not saying that its possible at all... but the weight of a mountain is dispersed over a larger area than that of a building of this size. So a building would be placing a large amount of weight onto a small area of the ground unlike a mountain

I was reading the local newspaper today and came across the article about the Taipei 101 building could be causing earthquakes... seems a bit silly considering that Taipei is prone to earthquakes anyway
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Old December 4th, 2005, 11:20 PM   #22
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I am gonna ask Ms. Cleo (if she's still alive) for the truth about this nonsense since she knows everything.
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Old December 5th, 2005, 04:32 AM   #23
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This is all president Bush's fault.
No seriously, this is just following the current fashion of looking at humans as vermin that should be exterminated, and everything created by man as a rape of mother nature.

Bet we'll soon be hearing that the global warming on Mars is our fault...
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Old December 5th, 2005, 09:25 AM   #24
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I think you need something the size of Taiwan itself to cause an earthquake.
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Old December 5th, 2005, 10:46 AM   #25
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shanghai is sinking, and will sink so fast they will have to move the entire city if also water levels in the oceans rise.
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Old December 5th, 2005, 11:55 AM   #26
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By Tiffany Wu
TAIPEI (Reuters) - Seismic activity in Taipei has increased since the world's tallest building, Taipei 101, was built, raising questions over whether the Taiwan capital has become more vulnerable to earthquakes, a geologist said on Friday.

Lin Cheng-horng, a geologist at the Institute of Earth Sciences at Taiwan's most prestigious think tank, the Academia Sinica, said seismic activity historically had been low in the Taipei basin, home to about 7 million people.

But the city has experienced more micro-earthquakes (of magnitude 2.0-2.5 on the Richter scale) since construction began on the 508-meter (1,667-ft) skyscraper in 1997, he said.

Two earthquakes of magnitude 3.8 and 3.2 occurred directly beneath Taipei 101 in October 2004 and March 2005, he said.

"There is a distinct possibility of earthquakes being triggered by the recent construction of the world's highest building, the imposing Taipei 101," Lin wrote in an article published in the Geophysical Research Letters Vol. 32 on November 30.

"Should seismic activity remain high or, even worse, should it significantly increase, then the possibility of earthquakes being triggered by the high-rise building will become ever so much more of a reality," he wrote.

Taipei 101 spokesman Michael Liu said while he respected the academic's views, the 101-storey building was a government-endorsed project that had met environmental and geological standards set by the Taiwan government.

Earthquakes occur frequently in Taiwan, which lies on a seismically active stretch of the Pacific basin, but Taipei itself has suffered minimal tremors in the past as it lies over the western boundary of the Philippine Sea plate.

VERTICAL STRESS?

An earthquake is caused by a sudden slip on a fault in the earth's crust. Stresses in the earth's outer layer push the sides of the fault together until rocks slip suddenly, releasing energy in waves that cause the ground to shake.

Lin said Taipei 101 weighed 700,000 tons and estimated stress from vertical loading on its foundation at 4.7 bars, of which some would be transferred to the earth's upper crust due to extremely soft sedimentary rocks beneath the Taipei basin.

"If a fault is about to crack, then a little pressure can trigger an earthquake. It's like the last straw that breaks the camel's back," Lin told Reuters in a telephone interview.

But that's only a theory, he said, adding that he could not determine whether or not Taipei 101 was responsible for the rise in seismic activity in the area in recent years.

"I don't know if it's just coincidence or if they are related," he said. "It's very hard to prove this scientifically, but it's just as hard to disprove it."

Thus, Lin is calling for immediate research into the issue, saying it could have far-reaching implications for other huge structures like the proposed 1,000-meter (3,281-ft) Sky City 1000 in Japan, another quake-prone area.

Earthquakes induced by human activity, such as water dams, have been documented in the United States, Japan, and Canada. But Lin said there were no specific studies into whether high-rise buildings can cause tremors.

He suggested Taiwan install more accurate sensors to monitor tremors -- most of Taiwan's sensors are above ground, unlike Japan, which has over 1,000 monitors hundreds of meters below the earth's surface.

The $1.7 billion Taipei 101, an office tower and shopping complex, was built to withstand tremors measuring above magnitude 7 and resist gale forces of more than 60 meters a second.
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In short, any effect is very unlikely unless the geologic situation is extremely unstable right now, im which case an earthquake is imminent no matter what. MAYBE it will happen a day or so earlier becase of TP101, although I don't believe it.
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Old December 6th, 2005, 02:31 AM   #27
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The weight of a building is irrelevant. However, what about possible geological effects of the foundation work? Driving piles would certainly stimulate something.
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Old December 7th, 2005, 01:53 AM   #28
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Quote:
Originally Posted by Jefferyi
I am gonna ask Ms. Cleo (if she's still alive) for the truth about this nonsense since she knows everything.
Ms. Cleo knows all!
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