Shaky faultline raises the threat of a super-volcano
April 01, 2005
AS if earthquake-ravaged Indonesia doesn't have enough to worry about, now scientists warn that a Sumatran super-volcano might blow its top at any time. If it does, the blast will toss hundreds of thousands of cubic kilometres of rock and ash into the atmosphere, dwarfing the eruptions of Krakatoa, Mount St Helens, Pinatubo and any conventional volcanic explosion of the past tens of thousands of years.
"These super-volcanoes are potentially the greatest hazard on Earth, the only greater threat being an asteroid impact from space," said Ray Cas, a vulcanologist with Monash University in Melbourne.
Professor Cas said a "major tectonic event" could be enough to trigger a deadly super-volcanic eruption. The likelihood that the Toba ? the largest super-volcano on Earth ? will erupt has increased significantly due to geological stresses generated by the recent quakes.
Worse, Toba sits directly atop the faultline running down the spine of Sumatra. That is where seismologists say a third quake might strike.
Comparison of volumes produced by some of the greatest volcanic eruptions. The Young Toba Tuff has an estimated volume of 2,800 cubic kilometers (km) and was erupted about 74,000 years ago. The Huckleberry Ridge Tuff, erupted at Yellowstone 2.2 million years ago, has a volume of 2,500 cubic km. The Lava Creek Tuff, erupted at Yellowstone 600,000 years ago, has a volume of 1,000 cubic km. The May 1980 eruption of Mount St. Helens produced 1 cubic km of ash. Not shown is the Fish Canyon Tuff of the San Juan Mountains of Colorado. The Fish Canyon Tuff was erupted 27.8 million years ago and has an estimated volume of 3,000 cubic km.
i wonder where i have heard this before.....oh yeah yellowstone. they never have anything good to say like its way way off or we will be safe for a while always making it seem so bad. just like global warming.....u do know that before an ice age the tempreture of the earth goes up not down, they forgot to tell us that.
and what they hell are they worried about? in the last ice age (which is what will happened if the volcano goes off) is that cavemen use to walk near the outside of the caves bear footed??? and they didnt have alot of technology to help them survive thru it, but they still did. just like we would.