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10.05.2016 admin
Professor Stephan Grilli, an international leader in the study of tsunamis, said the generally accepted explanation for the cause of the tsunami had been the earthquake, the fifth largest ever measured, which created a significant uplift and subsidence of the seafloor. In a series of models, Grilli and his former doctoral student Jeff Harris worked backwards in time to recreate the movement of the seafloor from the earthquake and concluded that an additional movement underwater about 100 kilometers north of the earthquake's epicenter must have occurred to propagate the large waves that struck Sanriku.
Reviewing surveys of the seafloor conducted by Japanese scientists before and after the earthquake, the scientists found signs of a large slump on the seafloor a€“ a rotational landslide 40 kilometers by 20 kilometers in extent and 2 kilometers thick that traveled down the slope of the Japan Trench, leaving a horizontal footprint the size of Paris that could only have been created by a 100-meter uplift in the seafloor. Grilli said it has been difficult to convince his Japanese colleagues of his research group's results.
Grilli also said that his analysis is under considerable scrutiny because it brings into question whether Japan had adequately prepared for natural disasters prior to the 2011 event. A moderate 6.5-magnitude earthquake struck off the coast of Nicaragua on Saturday and rattled nearby cities, but scientists said it was unlikely to have generated a major tsunami. The 2011 Japan tsunami, which killed up to 20,000 people and caused the partial meltdown of the Fukushima nuclear plant, was made worse by an underwater landslide, according to scientists. An erupting volcanic island that is expanding off Japan could trigger a tsunami if its freshly-formed lava slopes collapse into the sea, scientists said Tuesday.


Officials in Nidwalden Canton in Switzerland have announced that they have commissioned a study to look into the threat posed by a tsunami in Lake Lucernea€”a first for a European alpine region. A strong earthquake hit off the coast of eastern Indonesia's Sulawesi island on Wednesday, causing panic among residents, but there were no immediate reports of injuries or damage. The balmy waters of the Caribbean could turn into a deadly heat trap for countless tiny creatures.
A team of researchers from several institutions in Germany and Austria has found possible evidence of iron from a supernova in sediment cores taken from the floor of the Pacific Ocean. Until now estimates of how much of ice-free rock is exposed in Antarctica were stated as 'less than 1%'. While that adequately explains the 10-meter surge that affected much of the impacted area, Grilli said it cannot account for the 40-meter waves that struck a 100-kilometer area of Japan's mountainous Sanriku Coast.
So the URI engineers and colleagues at the British Geological Survey and the University of Tokyo went looking for evidence that something else happened there. Most assumed that the massive size of the earthquake was enough to create the waves that were observed.


There have been explosions at four of its six reactors and all four have released some radioactive material. A village near the coast of Sumatra lays in ruin after the Tsunami that struck South East Asia. British Telecom (the equivalent of France Telecom in England) decided to suing Google for violation of six U.S. On the company, Google violates copyright in many applications, either the Android Market, Google + or Google Maps.



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