Yellowstone Volcano

January 25, 2011 by staff 

Yellowstone Volcano, Yellowstone National Park in northwest Wyoming is a picturesque land of geysers, hot springs, waterfalls, mountains and lakes. But just in case you do not have enough worries, it is also the largest supervolcano in North America and among the top three largest in the world. The term “supervolcano” refers to a measure of the volume of erupted material and explosiveness. See comparison tables for volume and by the volcanic explosion index here. You will see that the Yellowstone supervolcano is after more than two scales.

The U.S. Geological Survey (USGS) map below shows the general framework of the volcano and the caldera of Yellowstone. Calderas are created after an eruption when the volcano collapsed in on itself.

According to the Yellowstone Volcano Observatory, operated by USGS and the University of Utah, over the last 2 million years the Yellowstone super volcano had three of the world’s largest volcanic eruptions:

Eruption of the> 2450 km ³ Huckleberry Ridge Tuff about 2.1 million years has created more than 75 km long Island Park Caldera.

The second cycle concluded with the eruption of the Mesa Falls Tuff about 1.3 million years, forming the 16 km-wide Henrys Fork caldera at the western end of the first caldera.

Activity subsequently shifted to the present Yellowstone Plateau and culminated 640,000 years ago with the eruption of> 1000 km ³ Lava Creek Tuff and the formation of this caldera 45 x 85 km. Resurgent doming subsequently occurred at both sides of the north and southwest of the caldera and voluminous (1,000 km ³) intracaldera rhyolitic lava flows erupted between 150,000 and 70,000 years.

Yellowstone is currently the site of one of the largest in the world, including hydrothermal systems largest concentration of geysers on Earth. As such, it could be one of the largest sources of geothermal electricity produced, but it is not likely to occur.

The map below shows the coverage of USGS ash deposits from the three major eruptions, from the 1980 eruption of Mount St. Helens. The map also shows the magnitude of the Bishop Tuff that erupted from the volcano, Long Valley, California 760,000 years ago.

Scientists predict that the greatest superpower in a volcano of America’s most popular national parks could erupt in the near future.

Caldera Yellowstone National Park erupted three times in the last 2.1 million researches and follow-up that we could be in another eruption.
They said that the super-volcano beneath the park in Wyoming has increased at a record rate since 2004 – has increased its floor three inches per year for the past three years alone, the biggest increase since records began in 1923.

He would explode with a force a thousand times more powerful than the eruption of Mount St. Helens in 1980.
Vomiting washed away in the sky; a cloud of ash plant killing is in range and dumps a 10-foot deep layer up to 1,000 miles.

Two-thirds of the United States could become uninhabitable toxic air sweeps through it, the land of thousands of flights and forcing millions to flee their homes.
But hampered by a lack of data they have stopped short of warning at all and they cannot put a date on when the next disaster could occur.

When the eruption occurs it finally dwarf the effect of Eyjafjallaj Iceland? Kull volcano, which erupted in April of last year, causing travel chaos around the world.

Scientists believe that magma reservoir monitoring swelling six miles underground may be the cause of the recent uprisings.

They also kept an eye on a “pancake-shaped blob” of molten rock, the size of Los Angeles that was pressed into the volcano some time ago.

But due to extreme conditions, it was difficult to work out what exactly is going down, leading researchers can not say with certainty what will happen – or when.

Since the explosion the most recent 640,000 years ago, there were about 30 smaller eruptions, the latest of which was 70,000 years ago.
They filled the caldera ash and lava and make the flat landscape that attracts thousands of tourists in Yellowstone National Park each year.

“Obviously a source of magma feeds Yellowstone and Yellowstone erupted since the recent geological past, we know there is magma at shallower depths too,” said Dan Dzurisin, an expert with the Yellowstone U.S. Geological Survey Cascades Volcano Observatory in Washington State.

“There must of magma in the crust, or we would not have any hydrothermal activity that we have.

“There’s so much heat coming out of Yellowstone right now that if it was not heated by the magma, the whole system would have been stone cold from the time of the last eruption 70,000 years ago.


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