[ACTUEEL] Vulkanen IJsland #20: Uitbarsting Bardarbunga

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Op woensdag 17 september 2014 00:31 schreef hangtime het volgende:
Hij spuwde vanavond als nooit tevoren maar ineens na een M5.4 gingen alle cams op zwart. Lijkt wel alsof er iets meer gaande is nu.

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Magnitude mb 4.8
Region ICELAND
Date time 2014-09-18 14:21:51.8 UTC
Location 64.84 N ; 17.05 W
Depth 10 km
Distances 246 km E of Reykjavķk, Iceland / pop: 113,906 / local time: 14:21:51.8 2014-09-18
106 km SE of Akureyri / pop: 16,563 / local time: 14:21:00.0 2014-09-18

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Op vrijdag 19 september 2014 08:51 schreef bwt het volgende:
Geen idee wat de grote uitslag van de grijze lijnen betekend. (??voorlopige meting??)
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En de bevingen update:
De zwaardere lijken meer verspreid en niet meer presies in de bardarbunga krater.
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twitter:

gislio twitterde op vrijdag 19-09-2014 om 09:40:31 Reduced seismic activity in #Bardarbunga caldera overnight - only 10 quakes in last 12 hours. reageer retweet

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Op zondag 21 september 2014 18:01 schreef aloa het volgende:
En recent een 4.2 beving!

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http://www.ijsland-enzo.n(...)spagina.asp?tabsel=0

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Iceland grows as Bardarbunga volcano continues to spew lava

VATNAJöKULL, Iceland, Sept. 22 (UPI) -- Iceland's Bardarbunga volcano is a prolific producer of lava, and thanks to its impressive magmatic output, the island nation is growing.
The activity within the Bardarbunga volcanic system is due to the fact that two massive tectonic plates, the Eurasian Plate and the North American Plate, are drifting apart. As they move away from each other, magma underneath Barbarbunga is rising up to fill the gap and helping to grow the size of the country.

The Bardarbunga lava field now stretches more that 14 square miles in size. "That corresponds about to the size of Manhattan," Rikke Pedersen, a researcher with the Nordic Volcanological Center at the University of Iceland, recently told NPR.

You can watch Iceland's growing pains in real time, as two cameras remain pointed at Bardarbunga -- the live feeds are here and here.

In addition to the lava flow, the shifting plates have also caused an extraordinary number of earthquakes. Iceland officials say there have been 20,000 small earthquakes recorded in the last month. It's not clear when all the seismic activity will die down.

Though officials say the last couple of weeks have been slightly quieter than the two before, officials wrote in a recent press release that there "is no significant change in the flow of lava and it is still too soon to say if the volcanic eruption is beginning to fade out."

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Bardarbunga volcano update: Eruption continues with steady and large lava output rate

The fissure eruption in Holuhraun continues with similar intensity as during the past days and shows no sign of stopping soon. The latest satellite images indicate that the lava now flows into two main branches, one (the older one) to the north and a new one to the east.
Astonishing lava volumes:

The lava flows erupted since the beginning cover around 37 square km and comprise a total volume of 0.4-0.6 cubic kilometers. If compared to an explosive eruption (for which the VEI scale was designed) using the Volcanic Explosivity Index (VEI) scale, the eruption has already reached the category VEI 5. It has so far erupted about the same volume of magma as the 1980 Mt. St. Helens eruption.

The discharge rate was estimated to 250-350 cubic meters per second. This corresponds to a cube measuring approx. 300 m on its sides. It would be enough to fill a soccer field with a pile 2-3 km tall of lava!

The subsidence of the Bardarbunga caldera continues with same rate as before, approx. 50 cm each day. It has now subsided by almost 30 meters in total.

twitter:

gislilundi twitterde op dinsdag 23-09-2014 om 21:04:21 Lava, a lot of it! @ruvfrettir @laraomars #Bardarbunga http://t.co/UOEvIyyQDw reageer retweet

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Op maandag 22 september 2014 10:09 schreef bwt het volgende:
En het is een aardig overzicht van de bevingen
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twitter:

Bromotengger twitterde op maandag 22-09-2014 om 14:48:42 Map with the earthquakes over magnitude 3 at #Bardarbunga186 since august 16th #Iceland http://t.co/jS0piqkRA5 reageer retweet

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Magnitude M 4.8
Region ICELAND
Date time 2014-09-24 08:14:38.9 UTC
Location 64.63 N ; 17.70 W
Depth 10 km
Distances 210 km E of Reykjavķk, Iceland / pop: 113,906 / local time: 08:14:38.9 2014-09-24
119 km S of Akureyri / pop: 16,563 / local time: 08:14:00.0 2014-09-24

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Op woensdag 24 september 2014 09:24 schreef aloa het volgende:
De vervuiling door de SO2-gassen zou volgens het Duitse blad Der Spiegel, nu meetbaar zijn in Duitsland, dus ook in Nederland, echter niet in alarmerende hoeveelheden.

http://www.ijsland-enzo.n(...)spagina.asp?tabsel=0

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Op dinsdag 23 september 2014 22:07 schreef bwt het volgende:

twitter:

Sim0nRedfern twitterde op dinsdag 23-09-2014 om 17:31:56 Volume of #Bardarbunga caledera drop is 0.6 cubic km. Lava field covers 37 square km & is 0.4-0.6 cubic km in volume. Equal? Continues... reageer retweet

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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

twitter:

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:

twitter:

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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De laatste beving heeft nog geen verzakking opgeleverd lijkt het.
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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 Žorsteinn 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.

Magnśs Tumi Gušmundsson, 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 Magnśs Tumi.

But the eruption is also notable for its release of gasses, particularly the amount of sulphurdioxide (SO2). Žorsteinn, 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 Žorsteinn 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 Bįršarbunga 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.