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Message: <blockquote data-quote="ibnanv" data-source="post: 6532863" data-attributes="member: 218596">Monstrous tsunami waves, like the one that killed over 200,000 people in  the Indian Ocean in 2004, create an electric field as they form. This  field could be sensed by a network of underwater sensors which would be  too expensive to build.   However, only five countries own such sensor arrays — the U.S.,  Australia, Indonesia, Chile and Thailand — partly due to the high cost  of installation.   Now, Manoj Nair and his team at the National Oceanic and Atmospheric  Administration in the U.S., have suggested the cheaper way of using the  undersea telecommunications cables to detect tsunami’s electric field,  the ‘New Scientist’ reported.   The electric filed is created as electrically charged salts in seawater  pass through the Earth’s magnetic field.   Computer modelling by Nair’s team shows that the electric field  generated by the tsunami that struck south-east Asia in 2004 induced  voltages of up to 500 millivolts. Their calculations show this is big  enough to be detected by volt-meters placed at the end of the  fibre-optic and copper cables that carpet the floor of the Indian Ocean.  </blockquote>

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