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Yellowstone Caldera The Biggest Volcanic Eruption Ever Awaits Mankind

Yellowstone Caldera The Biggest Volcanic Eruption Ever Awaits<br />
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Uploaded: 2014-08-19 17:12:47

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    Yellowstone Caldera The Biggest Volcanic Eruption Ever Yellowstone National Park lies on top of a magma chamber that is 35-miles wide, waiting to erupt.The Yellowstone Caldera is the volcanic caldera and supervolcano loca...
    Yellowstone Caldera The Biggest Volcanic Eruption Ever
    National Park lies on top of a magma chamber that is 35-miles wide,
    waiting to erupt.The Yellowstone Caldera is the volcanic caldera and
    supervolcano located in Yellowstone National Park in the United
    States, sometimes referred to as the Yellowstone Supervolcano. The
    caldera is located in the northwest corner of Wyoming, in which the
    vast majority of the park is contained. The major features of the
    caldera measure about 34 by 45 miles (55 by 72 km). The caldera
    formed during the last of three supereruptions over the past 2.1
    million years. First came the Huckleberry Ridge eruption 2.1 million
    years ago, which created the Island Park Caldera and the Huckleberry
    Ridge Tuff. Next came the Mesa Falls eruption 1.3 million years ago,
    which created the Henrys Fork Caldera and the Mesa Falls Tuff.
    Finally came the Lava Creek eruption 640,000 years ago, which
    created the Yellowstone Caldera and the Lava Creek Tuff.The last
    full-scale eruption of the Yellowstone Supervolcano, the Lava Creek
    eruption which happened nearly 640,000 years ago, ejected
    approximately 240 cubic miles (1,000 km3) of rock, dust and volcanic
    ash into the sky.Geologists are closely monitoring the rise and fall
    of the Yellowstone Plateau, which measures on average 0.6 inches
    (1.5 cm) yearly, as an indication of changes in magma chamber
    pressure.The upward movement of the Yellowstone caldera floor
    between 2004 and 2008 — almost 3 inches (7.6 cm) each year — was
    more than three times greater than ever observed since such
    measurements began in 1923. From mid-summer 2004 through mid-summer
    2008, the land surface within the caldera moved upward as much as 8
    inches (20 cm) at the White Lake GPS station. By the end of 2009,
    the uplift had slowed significantly and appeared to have stopped. In
    January 2010, the USGS stated that uplift of the Yellowstone Caldera
    has slowed significantly and that uplift continues but at a slower
    pace. The U.S. Geological Survey, University of Utah and National
    Park Service scientists with the Yellowstone Volcano Observatory
    maintain that they see no evidence that another such cataclysmic
    eruption will occur at Yellowstone in the foreseeable future.
    Recurrence intervals of these events are neither regular nor
    predictable. This conclusion was reiterated in December 2013 in the
    aftermath of the publication of a study by University of Utah
    scientists finding that the size of the magma body beneath
    Yellowstone is significantly larger than had been thought. The
    Yellowstone Volcano Observatory issued a statement on its website
    stating, Although fascinating, the new findings do not imply
    increased geologic hazards at Yellowstone, and certainly do not
    increase the chances of a supereruption in the near future. Contrary
    to some media reports, Yellowstone is not overdue for a
    supereruption. Other media reports were more hyperbolic in their
    coverage.A study published in GSA Today identified three fault zones
    that future eruptions are most likely to be centered on. Two of
    those areas are associated with lava flows aged 174,000--70,000
    years, and the third area is a focus of present-day seismicity.
  • Tags:  Yellowstone  Caldera  The  Biggest  Volcanic  Eruption  Ever  
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