Recent Disaster

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Published on August 27, 2010

Author: gokulstrikes

Source: authorstream.com

Recent Disaster : By Gokul Chandar AUCBE Recent Disaster ICELAND'S DISRUPTIVE VOLCANO : ICELAND'S DISRUPTIVE VOLCANO On 15th April, 2010, British civil aviation authorities ordered the country's airspace closed as of noon, due to a cloud of ash drifting from the erupting Eyjafjallajökull volcano in Iceland. The volcano has erupted for the second time in less than a month, melting ice, shooting smoke and steam into the air and forcing hundreds of people to flee rising floodwaters. The volcanic ash has forced the cancellation of many flights and disrupted air traffic across northern Europe, stranding thousands of passengers. Collected here are photos of the most recent eruption, and of last month's eruptions, which were from the same volcano, just several miles further east. Smoke billows from an erupting volcano which seems to be close to the top of the Eyjafjalla glacier on April 14, 2010 near Reykjavik. All London flights, including those from Heathrow, will be suspended from noon (1100 GMT) today due to volcanic ash from Iceland that has already caused almost 300 cancellations here, officials said. : Smoke billows from an erupting volcano which seems to be close to the top of the Eyjafjalla glacier on April 14, 2010 near Reykjavik. All London flights, including those from Heathrow, will be suspended from noon (1100 GMT) today due to volcanic ash from Iceland that has already caused almost 300 cancellations here, officials said. An aerial handout photo from the Icelandic Coast Guard shows flood caused by a volcanic eruption at Eyjafjalla Glacier in southern Iceland April 14, 2010. The volcanic eruption on Wednesday partially melted a glacier, setting off a major flood that threatened to damage roads and bridges and forcing hundreds to evacuate from a thinly populated area. Picture taken April 14, 2010. : An aerial handout photo from the Icelandic Coast Guard shows flood caused by a volcanic eruption at Eyjafjalla Glacier in southern Iceland April 14, 2010. The volcanic eruption on Wednesday partially melted a glacier, setting off a major flood that threatened to damage roads and bridges and forcing hundreds to evacuate from a thinly populated area. Picture taken April 14, 2010. Melting ice caused by a volcanic eruption at Eyjafjalla Glacier in southern Iceland April 14, 2010. : Melting ice caused by a volcanic eruption at Eyjafjalla Glacier in southern Iceland April 14, 2010. Photo taken on April 14, 2010 the Markarfljot glacial river, west of the Eyjafjalla glacier. Iceland's second volcano eruption in less than a month melted part of a glacier and caused heavy flooding on April 14, forcing up to 800 people to evacuate and grounding some flights over Norway. : Photo taken on April 14, 2010 the Markarfljot glacial river, west of the Eyjafjalla glacier. Iceland's second volcano eruption in less than a month melted part of a glacier and caused heavy flooding on April 14, forcing up to 800 people to evacuate and grounding some flights over Norway. Flooding caused by a volcanic eruption at Eyjafjalla Glacier in southern Iceland April 14, 2010. : Flooding caused by a volcanic eruption at Eyjafjalla Glacier in southern Iceland April 14, 2010. A man takes a picture of a road that has been washed away by flood water following the melting of the Eyjafjalla glacier due to the eruption of a volcano on April 14, 2010 near Reykjavik. : A man takes a picture of a road that has been washed away by flood water following the melting of the Eyjafjalla glacier due to the eruption of a volcano on April 14, 2010 near Reykjavik. In this Wednesday April 14, 2010 photograph, smoke and steam are seen rising from the volcano under the Eyjafjalla glacier in Iceland, which erupted for the second time in less than a month, melting ice, shooting smoke and steam into the air and forcing hundreds of people to flee rising floodwaters. : In this Wednesday April 14, 2010 photograph, smoke and steam are seen rising from the volcano under the Eyjafjalla glacier in Iceland, which erupted for the second time in less than a month, melting ice, shooting smoke and steam into the air and forcing hundreds of people to flee rising floodwaters. A natural-color satellite image shows lava fountains, lava flows, a volcanic plume, and steam from vaporized snow. The image was acquired on March 24, 2010, by the Advanced Land Imager (ALI) aboard NASA's Earth Observing-1 (EO-1) satellite. The lava fountains are orange-red, barely visible at the 10-meter (33-foot) resolution of the satellite. The scoria cones surrounding the fissure are black, as is the lava flow extending to the northeast. White volcanic gases escape from the vent and erupting lava, while a steam plume rises where the hot lava meets snow. (The bright green color along the edge of the lava flow is an artifact of the sensor.) : A natural-color satellite image shows lava fountains, lava flows, a volcanic plume, and steam from vaporized snow. The image was acquired on March 24, 2010, by the Advanced Land Imager (ALI) aboard NASA's Earth Observing-1 (EO-1) satellite. The lava fountains are orange-red, barely visible at the 10-meter (33-foot) resolution of the satellite. The scoria cones surrounding the fissure are black, as is the lava flow extending to the northeast. White volcanic gases escape from the vent and erupting lava, while a steam plume rises where the hot lava meets snow. (The bright green color along the edge of the lava flow is an artifact of the sensor.) This picture taken on March 27, 2010 shows lava spurting out of the site of a volcanic eruption at the Eyjafjallajökull volcano some 125 km east of Reykjavik. With lava still gushing, a small Icelandic volcano that initially sent hundreds fleeing from their homes is turning into a boon for the island nation's tourism industry, as visitors flock to catch a glimpse of the eruption. : This picture taken on March 27, 2010 shows lava spurting out of the site of a volcanic eruption at the Eyjafjallajökull volcano some 125 km east of Reykjavik. With lava still gushing, a small Icelandic volcano that initially sent hundreds fleeing from their homes is turning into a boon for the island nation's tourism industry, as visitors flock to catch a glimpse of the eruption. Tourists gather to watch lava spurt out of the site of a volcanic eruption at the Eyjafjallajökull volcano on March 27, 2010. Up to 800 people were evacuated in Iceland early on April 14, 2010 due to a volcano eruption under the Eyjafjallajokull glacier in the south of the island, police and geophysicists said. : Tourists gather to watch lava spurt out of the site of a volcanic eruption at the Eyjafjallajökull volcano on March 27, 2010. Up to 800 people were evacuated in Iceland early on April 14, 2010 due to a volcano eruption under the Eyjafjallajokull glacier in the south of the island, police and geophysicists said. People gather to watch lava flow at the site of a volcanic eruption at the Eyjafjallajökull volcano near the Eyjafjalla glacier on March 27, 2010. : People gather to watch lava flow at the site of a volcanic eruption at the Eyjafjallajökull volcano near the Eyjafjalla glacier on March 27, 2010. Heat shimmers above lava flowing from the Eyjafjallajökull volcano in Iceland on March 28th, 2010. : Heat shimmers above lava flowing from the Eyjafjallajökull volcano in Iceland on March 28th, 2010. Lava spurts out of the site of a volcanic eruption at the Eyjafjallajökull volcano near the Eyjafjalla glacier in Iceland on March 27, 2010. : Lava spurts out of the site of a volcanic eruption at the Eyjafjallajökull volcano near the Eyjafjalla glacier in Iceland on March 27, 2010. Smoke and steam hang over the volcano under the Eyjafjalla glacier in Iceland, early Thursday April 15, 2010. : Smoke and steam hang over the volcano under the Eyjafjalla glacier in Iceland, early Thursday April 15, 2010. Steam and hot gases rise above lava flowing from the Eyjafjallajökull volcano on April 3rd, 2010. : Steam and hot gases rise above lava flowing from the Eyjafjallajökull volcano on April 3rd, 2010. This image made available by NEODASS/University of Dundee shows the volcanic ash plume from Iceland, top left, to the north of Britain at received by NASA's Terra Satellite at 11.39 GMT Thursday April 15, 2010. : This image made available by NEODASS/University of Dundee shows the volcanic ash plume from Iceland, top left, to the north of Britain at received by NASA's Terra Satellite at 11.39 GMT Thursday April 15, 2010. Effects of the ash plume on air travel : Effects of the ash plume on air travel visual navigation sandblast windscreens melt turbine engines engines shut down no commercial aircraft were damaged engines of some military aircraft were harmed Ash cloud maps : Ash cloud maps Ash cloud maps : Ash cloud maps Short- and long-term weather and environmental effects : Short- and long-term weather and environmental effects At the mouth of the crater, the gases, ejecta, and volcanic plume have created a rare weather phenomenon known as volcanic lightning (or a "dirty thunderstorm"). When rocks and other ejecta collide with one another, it creates static electricity. This, coupled with the abundant amount of water-ice located at the summit, aids in the creation of lightning. Fluoride poisoning can start in sheep at a diet with fluorine content of 25 ppm. At 250 ppm, death can occur within a few days In 1783, 79 per cent of the Icelandic sheep stock were killed, probably as a result of fluorosis caused by the eruption of Laki Large-scale release of sulphur dioxide into the atmosphere also poses a potential health risk, especially to people with pre-existing breathing disorders. Short- and long-term weather and environmental effects : Short- and long-term weather and environmental effects While it is suspected that major volcanic eruptions that coincide with cyclic solar minimum activity could produce temporary global cooling or reduction in global temperature One proposed volcanic winter happened c. 70,000 years ago following the supereruption of Lake Toba on Sumatra island in Indonesia By analogy, the Laki eruption has been linked with extreme weather events from severe hailstorms in Great Britain to the Mississippi River freezing at New Orleans Sulfate aerosols that reach the stratosphere catalyze the production of chlorine monoxide (ClO), which destroys ozone (O3). In the upper troposphere, the same aerosols become nuclei for cirrus clouds, which increase the Earth's albedo and thus alter its radiation balance

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