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platinumdude
11th February 2011, 07:45 AM
http://www.telegraph.co.uk/news/worldnews/europe/iceland/8311924/Icelandic-volcano-set-to-erupt.html

Geologists detected the high risk of a new eruption after evaluating an increased swarm of earthquakes around the island's second largest volcano.

Pall Einarsson, a professor of geophysics at the University of Iceland, says the area around Bárdarbunga is showing signs of increased activity, which provides "good reason to worry".

He told the country's national TV station that a low number of seismometer measuring devices in the area is making it more difficult to determine the scale and likely outcome of the current shifts.

But he said there was "every reason to worry" as the sustained earthquake tremors to the north east of the remote volcano range are the strongest recorded in recent times and there was "no doubt" the lava was rising.

The geologist complained that the lack of coverage from measuring devices means he cannot accurately detect the depth and exact location of the increased number of localised earth movements.

"This is the most active area of the country if we look at the whole country together," he told the Icelandic TV News. "There is no doubt that lava there is slowly growing, and the seismicity of the last few days is a sign of it.

"We need better measurements because it is difficult to determine the depth of earthquakes because it is in the middle of the country and much of the area is covered with glaciers."

Respected volcano watcher Jón Frímann, said on his volcano watch blog: "After the Eyjafjallajökull volcano eruption in the year 2010 it seems that geologists in Iceland take earthquake swarms more seriously then they did before."

He explained the Icelandic Met Office had on Sunday warned of the increased risk of a eruption in north-west side of Vatnajökull glacier due to the high earthquake activity in the area, and added: "It is clear that only time is going to tell us if there is going to be a eruption in this area soon or not."

The last recorded eruption of Bárdarbunga was in 1910, although volcanologists believe its last major eruption occurred in 1477 when it produced a large ash and pumice fallout. It also produced the largest known lava flow during the past 10,000 years on earth.

It is the second largest volcano on Iceland and is directly above the mantle plume of molten rock.

By comparison, Bárdarbunga dwarves the Eyjafjallajökull volcano, which shutdown most of Europe's airspace last year after its ash cloud drifted across the continent's skies.

uncletonoose
11th February 2011, 08:24 AM
To add to the OP,

Yellowstone Has Bulged as Magma Pocket Swells

Some places saw the ground rise by ten inches, experts report.

Brian Handwerk

for National Geographic News

Published January 19, 2011

Yellowstone National Park's supervolcano just took a deep "breath," causing miles of ground to rise dramatically, scientists report.

The simmering volcano has produced major eruptions—each a thousand times more powerful than Mount St. Helens's 1980 eruption—three times in the past 2.1 million years. Yellowstone's caldera, which covers a 25- by 37-mile (40- by 60-kilometer) swath of Wyoming, is an ancient crater formed after the last big blast, some 640,000 years ago.

(See "When Yellowstone Explodes" in National Geographic magazine.)

Since then, about 30 smaller eruptions—including one as recent as 70,000 years ago—have filled the caldera with lava and ash, producing the relatively flat landscape we see today.

But beginning in 2004, scientists saw the ground above the caldera rise upward at rates as high as 2.8 inches (7 centimeters) a year. (Related: "Yellowstone Is Rising on Swollen 'Supervolcano.'")

The rate slowed between 2007 and 2010 to a centimeter a year or less. Still, since the start of the swelling, ground levels over the volcano have been raised by as much as 10 inches (25 centimeters) in places.

"It's an extraordinary uplift, because it covers such a large area and the rates are so high," said the University of Utah's Bob Smith, a longtime expert in Yellowstone's volcanism.

http://news.nationalgeographic.com/news/2011/01/110119-yellowstone-park-supervolcano-eruption-magma-science/