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7.8 Earthquake Chile
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[quote:Esoteric Morgan:MV8yNTIxNjc3XzQzNjEzODE5XzM0QTdCODNG] small excerpt: "But Tuesday night's quake was not the big one seismologists are expecting. "[b]Could be tomorrow, could be in 50 years;[/b] we do not know when it's going to occur. [color=red][b]But the key point here is that this magnitude-8.2 is not the large earthquake that we were expecting for this area.[/b][/color] We're actually still expecting potentially an even larger earthquake," said Mike Simons, a seismologist at the Geological Survey. Chile is one of the world's most earthquake-prone countries because just off the coast, the Nazca tectonic plate plunges beneath the South American plate, pushing the towering Andes cordillera to ever-higher altitudes. Nowhere along this fault is the pressure greater than in far northern Chile, an area known as the "Iquique seismic gap". The USGS says the seismic gap last saw a major quake in 1877, when a magnitude-8.8 quake hit. Another quake of similar force hit just north of the area in 1868 "This is the one remaining gap that hasn't had an earthquake in the last 140 years," said Simons. "We know these two plates come together at about 6, 7 centimeters a year, and if you multiply that by 140 years then the plates should have moved about 11 meters along the fault, and you can make an estimate of the size of earthquake we expect here." http://www.ndtv.com/article/world/chile-s-8-2-earthquake-not-the-big-one-expert-503646 [/quote]
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