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a possible cause for the more intense and devestating earthquakes that are being seen throughout the world could be the increased extraction of coal and oil especially since india and china and other developing nations came on line and the demand exploded--the daily burning off of this huge amount of oil and coal into gas causes the tectonic plates involved to become lighter and lighter and therefore are floating and moving faster resulting in what we have seen in recent years as more severe and stronger earthquakes--if this hypothesis is correct the world better start to monitor and control the extraction of coal and gas and other sources of energy should be put on a fast track before the earth comes apart at the seams---- 
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don't know about that. but i thought this was interesting... the Chile earthquake shifted the earth's axis by 3 inches and shortened our day by 1.26 microseconds: http://www.businessweek.com/news/2010-03-01/chilean-quake-likely-shifted-earth-s-axis-nasa-scientist-says.html
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I don't know if you've got a point there, sambuca, maybe these events are in the public consciousness more these days. Consider that in 1906 there was a magnitude 8.2 earthquake in Valpataiso, Chile, killing an estimated 20,000 people. They've had this before.
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