[ACTUEEL] Vulkanen IJsland #20: Uitbarsting Bardarbunga

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Op dinsdag 9 september 2014 21:12 schreef DemonRage het volgende:

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Als ze het in Noorwegen al kunnen ruiken en het einde van de uitbarsting is nog niet in zicht, dan ben ik benieuwd of we hier ook nog een keer "last" krijgen.

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Op woensdag 24 september 2014 12:41 schreef Re het volgende:
a drop is 0.6 cubic k

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Op woensdag 24 september 2014 12:59 schreef bwt het volgende:

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Zo iets ja

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Sim0nRedfern twitterde op woensdag 24-09-2014 om 12:52:31 another >M5 earthquake at #Bardarbunga, caldera drops another 30cm. Familiar? http://t.co/hk8MHCNqax reageer retweet

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twitter:

volcan01010 twitterde op woensdag 24-09-2014 om 15:22:12 Watch the #Bardarbunga dyke grow with the IMO's new interactive daily earthquake plots. http://t.co/rKXDeE8wv6 http://t.co/CTqKBFlSAu reageer retweet

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twitter:

NASA_EO twitterde op woensdag 24-09-2014 om 15:00:39 True- and false-color images of the #Bardarbunga eruption. http://t.co/6Xozl19CI8 http://t.co/yxes7gJVXb http://t.co/czsfP6opt9 reageer retweet

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Op donderdag 25 september 2014 09:54 schreef bwt het volgende:

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gislio twitterde op donderdag 25-09-2014 om 09:39:40 Eruption at #Holuhraun continues. #Bardarbunga subsidence continues. Seismic activity continues. SO2 continues. http://t.co/1IN2QozzJG reageer retweet

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Iceland releases more sulphur than all of Europe due to eruption

"It's clear that no eruption in the 20th century even comes close to this one. We have to go back to the 19th century to find an eruption that released so much gas. It exceeds all known measurements that we have," says Þorsteinn Jóhannsson at the Icelandic Environmental Agency, when asked about the notable traits of the Holuhraun eruption and the pollution that stems from it.

The eruption has, in only the span of 3 weeks, secured its place in the history books for at least two reasons.

Magnús Tumi Guðmundsson, professor in geophysics, has pointed out that the latest measurements indicate that the lava field is considerably larger than previously believed. The volume of the lava that has emerged from the crack north of the Dyngjujökull glacier is already believed to be at 500 million cubic meters. The surface area is approaching 40 square kilometers. Its thickness is most along the centerline; closest to the craters its 30 meters, but 18-22 meters elsewhere, with the average thickness around 14 meters.

The lava field is among the largest that has formed in Iceland in a long time. Looking back at eruptions in the past 150 years, only the 13-month long eruption from Hekla in 1947-1948 is larger. If the Holuhraun eruption continues with the same force as before, it will reach the same volume as the Hekla eruption in just 2 weeks, writes Magnús Tumi.

But the eruption is also notable for its release of gasses, particularly the amount of sulphurdioxide (SO2). Þorsteinn, who is a geophysicist that specializes in atmosphere quality, says that exact numberrs are unavailable but he believes that the amount of gasses discharged is around 10-20.000 tons a day, though certain measurements show a higher density.

"The gas emissions from Holuhraun are around 10-60 thousand tons of sulphur a day. By comparison the EU nations release 14 thousand tons of sulphur a day, and then we're counting every possible source; industry, energy production, mass transit, heating, etc," says Þorsteinn and adds that in that context the Holuhraun eruption is far from being a minor eruption. Quite the contrary.

The meeting of the Civil Protection's science council yesterday revealed that there are no visible signs of the eruption subsiding in force. The lavafield continues to grow and there is no reduction in volcanic products.

The glacier on the Bárðarbunga caldera has now sunken 27-28 meters since the start of the eruption and the seismicity in the mountain is the same as in recent days.