Acquired May 13, 2010, this natural-color image of Eyjafjallajökull Volcano shows a puffball of volcanic ash towering over a lower-altitude ash plume that fans out toward the southeast. The Grímsvötn eruption was the largest eruption in Iceland for 50 years. The May 2011 subglacial, basaltic eruption of Grímsvötn (64.42°N, 17.33°W) lasted 7 days and erupted 0.6–0.8 km 3 of tephra (Gudmundsson et al. The eruption was preceded by intensive earthquake activity lasting for about 1 hour. This was Grímsvötn's first eruption since 2004, when it sent ash as far as Finland (BGVN 29:10). Accessed May 23, 2011. Volcanic Eruption, Grimsvotn, Vatnajokull (glacier), Iceland May 21 2011 from Jon Gustafsson on Vimeo.. Klemetti, E. (2011, May 21). Image of the Day Increased activity at Eyjafjallajökull Volcano caused a new wave of flight cancellations in Ireland and Great Britain in early May 2010. More information on the May 21 eruption of Grímsvötn in Iceland. Today is National Voter Registration Day! Grímsvötn’s ash was forecast to travel toward the northeast, the Icelandic Met Office stated, and it was coarser and less likely to remain airborne long enough to reach European airspace. The crater at Grímsvötn - news 25 May Ash measurements - news 24 May Ash plume and ligtnings - news 22 May Eruption has started in Grímsvötn - news 21 May. "The ash in Eyjafjallajokull was persistent or unremitting and fine-grained," Einarsson said. The ice-covered Grímsvötn volcano produced an unusually large and powerful eruption in 2011. The plot comes from the Icelandic Met Office website. Eruption characteristics. Grímsvötn volcanic site in red. Grímsvötn is Iceland's most active volcano, with more than 65 recorded eruptions over the past 800 years. On May 21, 2011, Iceland’s Grímsvötn Volcano erupted, sending an ash plume 20 kilometers (12 miles) high. The eruption of the Grimsvotn volcano sends thousands of tonnes of volcanic ash into the sky on May 23, 2011 above Iceland. The map below gives a good idea of where the eruption happened in relation to the country and its capital, Reykjavik. Sign up for membership to become a founding member and help shape HuffPost's next chapter, Director of Trends and Social Media, The Huffington Post. The eruption continued during 21-28 May 2011. The area is uninhabited. Caption by Michon Scott and Robert Simmon. Volcanic plumes can provoke lightning, and the plume from Grímsvötn produced an intense lightning storm. Ash from Grímsvötn Volcano visible around Iceland. Accessed May 23, 2011. The explosive nature of the 2011 Grímsvötn eruption was due to the interaction of hot magma with ice and water, producing ash particles. Volcanic ash is made up of tiny pieces of rock and glass. 1 panel e) that is one of Iceland's most active volcanoes, started on the afternoon of May 21, 2011. Sulphur concentration measurements of the tephra indicate that it was triggered by a supply of new magma from depth (Sigmarsson 2012). Ash from the volcano reduced visibility to about 50 meters (160 feet) in some places. Raunvísindastofnun Háskólans, Reykjavík, RH-07-2011, 28 bls. 2012). The initial plume from Grímsvötn was higher than from Eyjafjallajökull, which only reached 8 kilometers (5 miles). Raunvísindastofnun Háskólans, Reykjavík, RH-05-2011, 46 bls. Grímsvötn eruption in Iceland. Volcanic Eruption at Grímsvötn Tagged as: eruption , Grímsvötn , Vatnajökull , volcano , webcam Florence Baudoux May 23, 2011 at 3:49 pm The 2011 eruption of the Grímsvötn volcano, located in the northwest of the Vatnajökull glacier in south-east Iceland (see Fig. "The ash in Grimsvotn is more coarse and not as likely to cause danger as it falls to the ground faster and doesn't stay as long in the air as in the Eyjafjallajokull eruption.". On 21 May 2011, Grímsvötn erupted and produced ash plumes that drifted toward western Norway, Denmark, and other parts of northern Europe and disrupted flights. You can see images of the enormous plume and previous eruptions below. Eruptions. Subglacial eruption starting at Iceland’s Grímsvötn. Part of HuffPost Environment. Glacial volcanoes sound like an oxymoron. The plume from the 2011 eruption of Grímsvötn was highly electrically charged, as shown by the considerable lightning activity measured by the United Kingdom Met Office's low-frequency lightning detection network. Grímsvötn is the most active volcano in Iceland with >60 known eruptions in the last 800 years. Overnight, the plume height dropped to 15 kilometers (9 miles), but occasionally rose to its initial altitude. It is the largest known effusive eruption that has occurred on earth during the past millennia. Volcanoes. The ice-covered Grímsvötn volcano on Iceland produced an unusually large and powerful eruption in 2011, sending ash 20km into the atmosphere, causing the cancellation of about 900 passenger flights. Atmosphere We made it easy for you to exercise your right to vote! At its peak, the lightning storm produced 1,000 times as many strikes per hour as Eyjafjallajökull had a year earlier. The eruption of the Grimsvotn volcano sends thousands of tonnes of volcanic ash into the sky on May 23, 2011 above Iceland. This research examines the degassing processes of the 2011 eruption, through density and vesicule analyses, to help uncover the reasons for the more vigorous eruption. During and after the eruption, scientists measured the effects that it had on the UK. The Aviation Colour Code for the volcano was raised to yellow from green on October 1, according to Yahoo News.. The Grímsvötn volcanic eruption, from 21 to 28 May, 2011, was the largest eruption of the Grímsvötn Volcanic System since 1873, with a Volcanic Explosivity Index (VEI) of magnitude 4. The raised threat level is a precaution, and does not necessarily mean an eruption is imminent, scientists said. Iceland's most active volcano has erupted, sending a plume of white ash 18,000 feet into the air. According to the AP, a no-fly zone has been put into effect 120 nautical miles surrounding the location of this event. In the southeast, ash has colored the snow surface dark brown. The 2011 Grímsvötn eruption was the biggest explosive Icelandic eruption since Katla 1918 *, producing twice as much material as Eyjafjallajökull 2010 in around one tenth of the time. The Grímsvötn eruption on May 2011 was the largest eruption in Iceland within the last hundred years (Thordarson & Larsen, 2007). 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