Thursday, 27 September 2012

April Sumatra quakes signal Indian ocean plate break-up


The sequence of huge earthquakes that struck off the coast of Sumatra in April may signal the creation of a new tectonic plate boundary.
Scientists give the assessment in this week's Nature journal.
They say their analysis of the tremors - the biggest was a magnitude 8.7 - suggests major changes are taking place on the ocean floor that will eventually split the Indo-Australian plate in two.
It is not something that will happen soon; it could take millions of years.
"This is a process that probably started eight to 10 million years ago, so you can imagine how much longer it will take until we get a classic boundary," said Matthias Delescluse from the Ecole Normale Superieure in Paris.
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