Scientists fear new super-volcano may be forming in Bolivia

Friday, October 21, 2011
By Paul Martin

The Extinction Protocol
October 20, 2011

BOLIVIA – Should anyone ever decide to make a show called “CSI: Geology,” a group of scientists studying a mysterious and rapidly inflating South American volcano have got the perfect storyline. Uturuncu is a nearly 20,000-foot-high (6,000 meters) volcano in southwest Bolivia. Scientists recently discovered the volcano is inflating with astonishing speed. “I call this ‘volcano forensics,’ because we’re using so many different techniques to understand this phenomenon,” said Oregon State University professor Shan de Silva, a volcanologist on the research team. Researchers realized about five years ago that the area below and around Uturuncu is steadily rising — blowing up like a giant balloon under a wide disc of land some 43 miles (70 kilometers) across. Satellite data revealed the region was inflating by 1 to 2 centimeters (less than an inch) per year and had been doing so for at least 20 years, when satellite observations began. “It’s one of the fastest uplifting volcanic areas on Earth,” de Silva told OurAmazingPlanet. “What we’re trying to do is understand why there is this rapid inflation, and from there we’ll try to understand what it’s going to lead to.” The peak is perched like a party hat at the center of the inflating area. ”It’s very circular. It’s like a big bull’s-eye,” said Jonathan Perkins, a graduate student at the University of California, Santa Cruz, who recently presented work on the mountain at this year’s Geological Society of America meeting in Minneapolis. Scientists figured out from the inflation rate that the pocket of magma beneath the volcano was growing by about 27 cubic feet (1 cubic meter) per second. “That’s about 10 times faster than the standard rate of magma chamber growth you see for large volcanic systems,” Perkins told OurAmazingPlanet. “It’s not a volcano that we think is going to erupt at any moment, but it certainly is interesting, because the area was thought to be essentially dead,” de Silva said. Uturuncu is surrounded by one of the most dense concentrations of super-volcanoes on the planet, all of which fell silent some 1 million years ago.

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