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CHAMPAIGN, Ill. — A new study provides "incontrovertible evidence" that the volcanic super-eruption of Toba on the island of Sumatra about 73,000 years ago deforested much of central India, some 3,000 miles from the epicenter, researchers report. The volcano ejected an estimated 800 cubic kilometers of ash into the atmosphere, leaving a crater (now the world's largest volcanic lake) that is 100 kilometers long and 35 kilometers wide. Ash from the event has been found in India, the Indian Ocean, the Bay of Bengal and the South China Sea. The bright ash reflected sunlight off the landscape, and volcanic sulfur...

A great explosion of purity is about to come , But "not" as before(as Katrina) ,something straight from my kingdom , The heavenlies are about to applaud , I AM The Lord behold I alone am God ! Yet for my children of my rod and staff , They shall rest in my bossom of Zion and laugh , For the Joy of The Lord is their strength , And these are my children of victiory that have gone the full length , Obedience to me has become their rod , My staff is their com(fort) for I AM their...

Today's subject was inspired by Gunung Karangetang, one of the numerous Indonesian volcanoes that just happens to be percolating a bit right now. In the course of discovering a photostream on Flickr that has a lot of volcano pictures, I also discovered a volcano I never heard of (Mbwelesu on Vanuatu) which has (or had) an active lava lake. Because lava lakes are so rare, and because it's something that I tend to remember, I'm a little peevishly surprised that this one got by me until today. Mr. hshdude doesn't tell us much about himself, so thanks for the pics,...

Enlarge ImageHumble beginnings. An experiment in the 1950s with primordial gases and sparks produced some of life's building blocks.Credit: Ned Shaw/Indiana University/Science A once-discarded idea about how life started on our planet has been given a new life of its own, thanks to a serendipitous find. The story traces back to the early 1950s, when chemists Stanley Miller and Harold Urey of the University of Chicago in Illinois tried to recreate the building blocks of life under conditions they thought resembled those on the young Earth. The duo filled a closed loop of glass chambers and tubes with water...

University of Alberta scientists contend they have the answer to mass extinction of animals and plants 93 million years ago. The answer, research has uncovered, has been found at the bottom of the sea floor where lava fountains erupted, altering the chemistry of the sea and possibly of the atmosphere.Undersea volcanic activity triggered a mass extinction of marine life and buried a thick mat of organic matter on the sea floor about 93 million years ago, which became a major source of oil, according to a new study. "It certainly caused an extinction of several species in the marine environment,"...

PARIS (AFP) - Ninety-three million years ago, Earth was a reshuffled jigsaw of continents, a hothouse where the average temperature was nearly twice that of today. Palm trees grew in what would be Alaska, large reptiles roamed in northern Canada and the ice-free Arctic Ocean warmed to the equivalent of a tepid swimming pool. So our planet was balmy -- but hardly a biological paradise, for it was whacked by a mass die-out. The depths of the ocean suddenly became starved of oxygen, wiping out swathes of marine life.

In 1999, seismographs detected a swarm of earthquakes at a spot on the Gakkel ridge, a midocean ridge that traverses the Arctic. A few expeditions to the area, north of Siberia about 350 miles from the pole, produced indirect evidence of explosive eruptions deep on the seafloor. Explosive volcanism at such depths would be very unusual, said Robert A. Sohn of the Woods Hole Oceanographic Institution in Massachusetts. “People had been afraid to even suggest it, because it seemed so ludicrous.” Seafloor volcanoes do erupt violently, but in relatively shallow water. The Gakkel ridge spot is 13,000 feet down, and...

Climate Change: While the media scream that man-made global warming is making the North Pole ice-free, another possible cause is as old as the Earth itself. They just have to look deeper.To the delight of Al Gore and the rest of the Gaia groupies, scientists at the National Snow & Ice Data Center in Colorado are predicting that the North Pole will be completely free of ice this summer. The apocalyptic headlines already are starting to appear. "From the viewpoint of science, the North Pole is just another point on the globe, but symbolically it is hugely important," says the...

PARIS (AFP) - Recent massive volcanoes have risen from the ocean floor deep under the Arctic ice cap, spewing plumes of fragmented magma into the sea, scientists who filmed the aftermath reported Wednesday. The eruptions -- as big as the one that buried Pompei -- took place in 1999 along the Gakkel Ridge, an underwater mountain chain snaking 1,800 kilometres (1,100 miles) from the northern tip of Greenland to Siberia. Scientists suspected even at the time that a simultaneous series of earthquakes were linked to these volcanic spasms. But when a team led of scientists led by Robert Sohn of...

Big Bangs: 'Stirring' Secrets Of Deadly Supervolcanoes UncoveredSupervolcanoes are orders of magnitude greater than any volcanic eruption in historic times. They are capable of causing long-lasting change to weather, threatening the extinction of species, and covering huge areas with lava and ash. (Credit: iStockphoto/Koch Valérie) ScienceDaily (May 30, 2008) — Researchers from McGill University and the University of British Columbia (UBC) have simulated in the lab the process that can turn ordinary volcanic eruptions into so-called “supervolcanoes,” with potentially devastating worldwide impact. The study was conducted by Dr. Ben Kennedy and and Dr. Mark Jellinek of UBC’s Department of Earth...

Just a cool-looking shot from space.

One of the leaders of the alleged airline suicide plot threatened "volcanoes of anger and revenge" on the British public for caring more about foxhunting than the war in Iraq, a court has heard. Ahmed Abdulla Ali, 27, filmed a "martyrdom video" in which he said that large demonstrations had forced the Government to change its policy on bloodsports and accused his targets of showing "more care and concern for animals" than for Muslims. He said he would teach the West a "lesson they will never forget" in the video played to the jury. Ali and seven other men are...

LONDON (Reuters) - Gas-belching volcanoes may be to blame for a series of mass extinctions over the last 545 million years, including that of the dinosaurs, new evidence suggested on Thursday. A series of eruptions that formed the Deccan Traps in what is now India pumped huge amounts of sulfur into the atmosphere 65 million years ago, with likely devastating repercussions for the Earth's climate, scientists said. Gigantic eruptions, forming so-called "flood basalts," are one of two leading explanations for a series of mass extinctions that have killed off species periodically throughout history. The other theory involves asteroid impacts --...

Another factor might be contributing to the thinning of some of the Antarctica's glaciers: volcanoes. In an article published Sunday on the Web site of the journal Nature Geoscience, Hugh Corr and David Vaughan of the British Antarctic Survey report the identification of a layer of volcanic ash and glass shards frozen within an ice sheet in western Antarctica. "This is the first time we have seen a volcano beneath the ice sheet punch a hole through the ice sheet" in Antarctica, Vaughan said. Volcanic heat could still be melting ice to water and contributing to thinning and speeding up...

Just when you're wondering what to post for the Geology Picture of the Week, something new pops up. IN this case, some aerial shots of volcanoes in Alaska. The link above goes to the site; three examples below. Augustine volcano (foreground), Iliamna on horizon Fourpeaked Volcano's glacier descends to Cook Inlet Shishaldin, Fuji of the Aleutians

Posted this question on another thread but had very little response. As I look at the ring of fire right now, there is a massive amount of activity, BIG activity in the Pacific ocean towards Asia. There is also a lot of activity in South America and a little in Central America. The only thing on my chart on the west coast that registered at 4.0 or above was a small quake in Oregon. Question is, with all of these plates shifting, and the plates around our nation's plates staying pretty quiet, what is this doing to our risks of...

Thousand of new volcanoes revealed beneath the waves 10:04 09 July 2007 NewScientist.com news service Catherine Brahic The true extent to which the ocean bed is dotted with volcanoes has been revealed by researchers who have counted 201,055 underwater cones. This is over 10 times more than have been found before. The team estimates that in total there could be about 3 million submarine volcanoes, 39,000 of which rise more than 1000 metres over the sea bed. "The distribution of underwater volcanoes tells us something about what is happening in the centre of the Earth," says John Hillier of the...

There are some who, lacking the ecstatic thrill of any other faith-based religion, wish to believe that the Earth is in the early stages of an unprecedented climatic change which will see temperatures soar, the polar ice caps melt, rising sea levels flood our coastal cities -- general devastation on the biblical model -- all because we insist on driving petroleum-fueled private automobiles and using electricity generated by burning coal. Burning that stuff releases into the atmosphere large amounts of carbon dioxide, you see, a "greenhouse gas" that contributes to the ongoing warming of the planet. Now, this is almost...

Source: NASA/Goddard Space Flight Center Date: April 12, 2007 NASA Data Show Earthquakes May Quickly Boost Regional Volcanoes Science Daily — Scientists using NASA satellite data have found strong evidence that a major earthquake can lead to a nearly immediate increase in regional volcanic activity. The intensity of two ongoing volcanic eruptions on Indonesia's Java Island increased sharply three days following a powerful, 6.4-magnitude earthquake on the island in May 2006. The increased volcanic activity persisted for about nine days. The Merapi and Semeru volcanoes released plumes of ash and steam on June 8, 2006. The plumes (gray) with Merapi...

The plume is seen as an umbrella-shaped feature in the long exposure image to the right Nasa's New Horizons spacecraft has sent back images of a huge volcanic eruption on Jupiter's moon Io.A massive dust plume, estimated to be 150m (490ft) high, can be seen erupting from the Tvashtar volcano on Io. On Wednesday, the US probe flew by Jupiter, using the planet's gravity to boost its speed, reducing the travel time to its ultimate target of Pluto. New Horizons also took photos of the icy moons Europa and Ganymede in the run-up to its encounter with Jupiter. Turning...