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How Earthquakes in Chile Have Permanently Deformed Earth

Posted April 29, 2013 1:12 PM

From Science:

Earthquakes can permanently crack the Earth, an investigation of quakes that have rocked Chile over the past million years suggests. Although earthquakes can wreak havoc on the planet's surface, more than a century of research has suggested the Earth actually mostly rebounds after quakes, with blocks of the world's crust elastically springing back, over the course of months to decades, to the way they initially were. Such rebounding was first seen after investigations of the devastating 1906 San Francisco temblor that helped lead to the destruction of more than 80 percent of the city. The rebound is well-documented nowadays by satellite-based GPS systems that monitor Earth's movements.

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Guru
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#1

Re: How Earthquakes in Chile Have Permanently Deformed Earth

04/30/2013 3:15 AM

Is there something special about Chile, then (tips hat to all Chilean readers) or does that apply to all earthquakes? One wouldn't want New Zealand to get left out, would one?

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#2
In reply to #1

Re: How Earthquakes in Chile Have Permanently Deformed Earth

04/30/2013 3:36 AM

Some more and some less.

But I am not sure why they ever thought the behaviour is elastic when rock plainly is not!

Just had a look at the map and New Zealand looks like its broken in half already!

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
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#3
In reply to #2

Re: How Earthquakes in Chile Have Permanently Deformed Earth

04/30/2013 4:12 AM

Granite bends. Just ask the researchers who built a highly-sensitive tilt gauge and left it running over the holidays in a building at Aberdeen University. "Ooh look: the tide goes in. The tide goes out..."

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Guru

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#4
In reply to #3

Re: How Earthquakes in Chile Have Permanently Deformed Earth

04/30/2013 9:51 AM

Ok its plastic but it breaks!

Who was said Scottish man (or researcher in Scotland). Any link?

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