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Super Volcano In Yellowstone National Park
Wed Aug 6 22:57:28 2003
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Super Volcano In Yellowstone National Park
http://www.solcomhouse.com/yellowstone.htm 

It is little known that lying underneath one of The United States largest and most picturesque National Parks - Yellowstone Park - is one of the largest "super volcanoes" in the world.

The term "supervolcano" has no specifically defined scientific meaning. It was used by the producers of The BBC TV show Horizion in 2000 to refer to volcanoes that have generated Earth's largest volcanic eruptions. As such, a supervolcano would be one that has produced an exceedingly large, catastrophic explosive eruption and a giant caldera.

Scientists have revealed that Yellowstone Park has been on a regular eruption cycle of 600,000 years. The last eruption was 640,000 years ago…so the next is overdue. The next eruption could be 2,500 times the size of the 1980 Mount St. Helens eruption. Volcanologists have been tracking the movement of magma under the park and have calculated that in parts of Yellowstone the ground has risen over seventy centimeters this century.

Around the world there are several other volcanic areas that can be considered "supervolcanoes"- Long Valley in eastern California, Toba in Indonesia, and Taupo in New Zealand. Other "supervolcanoes" would likely include the large caldera volcanoes of Japan, Indonesia, Alaska (e.g. Aniakchak, Emmons, Fisher).
GO HERE FOR MAP AND MORE INFO:
http://www.solcomhouse.com/yellowstone.htm

Trouble brewing? YELLOWSTONE NATIONAL PARK
http://www.casperstartribune.net/articles/2003/08/05/news/wyoming/9534443be1deb670c0399aa772037812.txt


YELLOWSTONE NATIONAL PARK (AP) -- Scientists are concerned about a 100-foot-high bulge in the bottom of Yellowstone Lake, saying it could have been formed by carbon dioxide or steam and that it could explode.

U.S. Geological Survey scientists have been studying the "inflated plain" under the northern end of the lake near Mary Bay, the Cody Enterprise reports.

Geological Survey geologist Lisa Morgan has been using sonar to map the lake bottom. She has also been recording water temperature and said temperatures 60 feet down have been as warm as 85 degrees.

Usually the lake gets no warmer than 66 degrees.

The bulge is about 2,100 feet long and Morgan suspects it has been formed only within the last few years.

"We're thinking this structure could be a precursor to a hydrothermal explosive event," she said. "But we don't think this is a volcano."

An explosion would likely cause a large crater -- not to mention the 10-foot waves, rocks and poisonous gas that could be released.

Morgan pointed out that Mary Bay itself is the world's largest hydrothermal explosion crater. Also underwater is Elliott's Crater, which measures nearly a half-mile wide.

Morgan plans to return to Yellowstone this month to study the lake from a raft-like boat. The boat will carry a submersible robot that will take rock and sand samples from the lake bottom.

She said her team hopes to prepare a danger assessment this fall. Possible scenarios besides an explosion include nothing happening.

Although Yellowstone Lake is in the caldera of a super volcano, Morgan said there is no evidence of volcanic activity at the lake bottom. The Yellowstone volcano has spewed material across much of what is now the United States.

Update on Current Volcanic Activity
http://volcano.und.nodak.edu/vwdocs/current_volcs/current.html

http://volcano.und.nodak.edu/vw.html

Yellowstone National Park -- The Total Yellowstone Page
Everything you wanted to know about Yellowstone National Park
http://www.yellowstone-natl-park.com/
 
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