Iceland's Grímsvötn Volcano erupted May 21, 2011, and the ash has currently delayed almost a thousand flights and could cancel more than 500. This is the strongest eruption in 100 years and the ash cloud is 10 times larger than the previous eruption of this volcano, in 2004.
According to Wikipedia, "On 23 May, the eruption was releasing about 2000 tons of ash per second, totaling 120 million tons in the first 48 hours. The 2011 eruption of Grímsvötn thus qualified as 4 (VEI4) on the Volcanic Explosivity Index (VEI), releasing more ash in the first 48 hours than Eyjafjallajökull released during its entire 2010 eruption."
The Eyjafjallajökull Volcanic Eruption occurred in 2010 with a series of eruptions starting from March 20, 2010 to May 23, 2010. Activity was monitored after May 23 and the volcano was considered to be dormant after activity stopped for three months. Air travel was significantly affected by the eruption, which was of much greater magnitude than the most recent eruption.
A spectacular video of the Grímsvötn eruption can be found here. In the video you can see the electrical storms that are sometimes produced by the eruptions. Below is a satellite image of the eruption. You can see the ash column in the center and the ash more to the south. The image is from the MODIS instrument on NASA's Terra satellite.
For more information about Grímsvötn and Eyjafjallajökull, as well as other volcano around the world, check out this link.
According to Wikipedia, "On 23 May, the eruption was releasing about 2000 tons of ash per second, totaling 120 million tons in the first 48 hours. The 2011 eruption of Grímsvötn thus qualified as 4 (VEI4) on the Volcanic Explosivity Index (VEI), releasing more ash in the first 48 hours than Eyjafjallajökull released during its entire 2010 eruption."
The Eyjafjallajökull Volcanic Eruption occurred in 2010 with a series of eruptions starting from March 20, 2010 to May 23, 2010. Activity was monitored after May 23 and the volcano was considered to be dormant after activity stopped for three months. Air travel was significantly affected by the eruption, which was of much greater magnitude than the most recent eruption.
A spectacular video of the Grímsvötn eruption can be found here. In the video you can see the electrical storms that are sometimes produced by the eruptions. Below is a satellite image of the eruption. You can see the ash column in the center and the ash more to the south. The image is from the MODIS instrument on NASA's Terra satellite.
For more information about Grímsvötn and Eyjafjallajökull, as well as other volcano around the world, check out this link.
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