[ACTUEEL] Vulkanen IJsland #20: Uitbarsting Bardarbunga

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Op vrijdag 14 november 2014 15:39 schreef Frutsel het volgende:
uitstoot 60.000 ton SO2 per dag...

die heeft er zin in

twitter:

volcan01010 twitterde op vrijdag 14-11-2014 om 15:22:22 SO2 from #Holuhraun made 40% of Icelandic rain samples acidic. Lowest pH so far, 3.5, is like grapefruit juice. http://t.co/xVz3Q1046Q reageer retweet

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Op dinsdag 28 oktober 2014 12:10 schreef bwt het volgende:

twitter:

uni_iceland twitterde op dinsdag 28-10-2014 om 11:14:54 #Bardarbunga continues to subside, –40m so far. Signs of increased geothermal activity. Credit Žórdķs Högnadóttir http://t.co/NZFrRN2cp8 reageer retweet

[ afbeelding ]

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Op maandag 3 november 2014 12:19 schreef bwt het volgende:
Bevingen blijven onverminderd doorgaan

twitter:

eruptionchaser twitterde op maandag 03-11-2014 om 07:15:18 @subglacial Big quake... correlated this time with big GPS 'up' spike.. http://t.co/N3xwnPHhE0 reageer retweet

[ afbeelding ]
5,3 is bijgesteld naar 5,4


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twitter:

subglacial twitterde op maandag 03-11-2014 om 12:35:49 #Bįršarbunga #Holuhraun. Latest official update. Basically, everything is at a steady-state. http://t.co/lMMHhiCwwb reageer retweet

http://avd.is/en/wp-conte(...)arbunga_20141103.pdf

[..]

twitter:

subglacial twitterde op zondag 16-11-2014 om 10:21:50 #Bįršarbunga. After M5.4 EQ seismic activity dropped temporarily. More repeats could reveal subsidence mechanism(s). http://t.co/muIozr5gGb reageer retweet

twitter:

subglacial twitterde op zondag 16-11-2014 om 23:31:45 #Bįršarbunga. New map shows extent of lava field. Growth is on south side. http://t.co/muIozr5gGb http://t.co/NRG5FuYOdI reageer retweet

twitter:

uni_iceland twitterde op woensdag 12-11-2014 om 19:57:58 The coast guard flew over #Holuhraun eruption site yesterday with some of our scientists. Credit: J. Gušbjartsson http://t.co/4UplmXLz9O reageer retweet

twitter:

uni_iceland twitterde op woensdag 12-11-2014 om 19:58:44 Tech guy Žorsteinn Jónsson shovels fresh lava from #Holuhraun eruption. He practically lives up there. http://t.co/tIc3J9WOrV reageer retweet

twitter:

uni_iceland twitterde op woensdag 12-11-2014 om 20:01:52 This would be a nice place to barbecue… or maybe it's a bit too hot #Holuhraun #Bardarbunga yesterday http://t.co/RtfD3wsCLA reageer retweet

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Op maandag 17 november 2014 09:35 schreef GekkePoes het volgende:
Grillen op lavasteen . Maar geeft verse lavasteen geen rare chemische dampen af die het vlees bederven?

Het blijft trouwens gestaag doorgaan.

twitter:

uni_iceland twitterde op maandag 17-11-2014 om 10:47:03 Satellite image of new #Holuhraun yesterday. It's now roughly 73 km2 with a volume of more than 1 km3 #Bardarbunga http://t.co/mHTz5kdxoL reageer retweet

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• The volcanic eruption in Holuhraun continues with similar intensity as it has for the last two weeks. Lava continues to flow out of the lava lake in the crater to east southeast. The Lava field is now about 72 square kilometres.
• Seismic activity in Bardarbunga continues to be strong. The two biggest earthquakes that were detected since noon on Friday were both of magnitude M5,4. On Friday, 14. November at 11:25 and on Sunday, 16. November, at 01:37. In total 16 earthquakes bigger then M4,0 were detected over the period and 25 earthquakes between M3,0-3,9. In total 160 of earthquakes were detected in Bardarbunga since noon on Friday.
• About 50 smaller earthquakes were detected in the dyke and at the eruption site in Holuhraun. All of them under magnitude M1,6.
• The subsidence of the Bardarbunga caldera continues with similar rate as last few weeks. The rate of the depression in the centre of the caldera is decreasing but the flow of magma underneath the caldera is not decreasing since the depression area in the caldera continues to enlarge with the same rate as it has for the last three months.
• GPS measurements outside of Bardarbunga show that the displacement is slowing down.

twitter:

IcelandicTimes twitterde op dinsdag 18-11-2014 om 22:37:59 Ongoing volcano eruption in #Holuhraun #Iceland - credit to Daši Haršarson @nyjarviddir.is http://t.co/UOnIdJ54cX reageer retweet

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eruptionchaser twitterde op donderdag 20-11-2014 om 11:02:01 @subglacial @eruptionsblog Uh oh. M4.5 @ 7.5km right on Hekla summit ridge. Quality 99% so presume for real: http://t.co/DHRPoYYSWe reageer retweet

twitter:

eruptionchaser twitterde op donderdag 20-11-2014 om 11:06:39 @subglacial @eruptionsblog Belay that... *of course* 2 mins after I tweet, their 99% 4.5 is revised to a 99% 0.9... reageer retweet

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Notes
• The volcanic eruption in Holuhraun continues to be strong. The activity is similar as it has been for the last two weeks but the lava flow is more fluctuating. The lava flow forms an extrusion to the east southeast. From midSeptember the productivity of the eruption has decreased.
• Seismic activity in Bardarbunga continues to be strong. The biggest earthquake that was detected since noon on Wednesday, 18. November at 00:26 was of magnitude M4,6. In total 16 earthquakes bigger then M4,0 were detected over the period and 39 earthquakes between M3,0-3,9. In total 170 earthquakes were detected in Bardarbunga since noon on Wednesday.
• On Thursday, 20 November at 08:46 an earthquake of magnitude M1,9 was detected in the dyke. Three other earthquakes larger then M1,5 were detected in the dyke since Wednesday. In total 65 earthquakes were detected in the dyke over the period, which is more activity then has been detected over the past few weeks. Most of the earthquakes were detected in north end of the dyke but about 15 earthquakes, including the larger ones, were more to the south and under Vatnajokull glacier.
• The subsidence of the Bardarbunga caldera and tectonics continues with similar rate as last few weeks. Tectonicsmovements show depression towards Bardarbunga.

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report
• The volcanic eruption in Holuhraun continues to be strong. The lava flow and the gas emission in the volcanic plume is more fluctuating than it has been. There is a double pulse cycle, or fluctuation, one takes hours and the other takes between 10 and 20 seconds.
• Seismic activity in Bardarbunga continues to be strong. The biggest earthquakes that was detected since noon on Friday, were of magnitude M5,1 on Sunday, 23. November at 09:22 and this morning, 24. November, at 09:03 of magnitude M5,4. In total 36 earthquakes bigger then M4,0 were detected over the period and 56 earthquakes between M3,0-3,9. In total about 250 earthquakes were detected in Bardarbunga since noon on Friday.
• First analysis from a new seismograph, which was installed on Bardarbunga on 11. November, shows that the earthquakes in the Bardarbunga caldera originate in the uppermost three kilometres of the earth’s crust. This indicates that the magma is closer to the earth’s surface than was estimated before.
• On Saturday, 22 November, at 00:51 an earthquake of magnitude M1,7 was detected in the dyke. In total about 80 earthquakes were detected in the dyke and around the eruption site in Holuhraun since Friday.
• The subsidence of the Bardarbunga caldera and tectonics continues with similar rate as last few weeks. Tectonics movements show depression towards Bardarbunga.

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There are no major changes in the eruption in Holuhraun. From the looks on the web cameras it appears that wall of the crater has possibly collapsed, I don’t have it confirmed. Other possibility is that the eruption in Holuhraun has increased for the time being. Some lava strokes can be spotted on the north edge of the crater at the moment. The lava flow seems to have changed direction at the moment, the size of the lava field is now close to 72 km².

twitter:

subglacial twitterde op dinsdag 25-11-2014 om 10:20:50 Subsidence of #Bįršarbunga caldera. Gaps in data stream due to connection problems - likely due to icing. http://t.co/82vnbwL2U9 reageer retweet

twitter:

subglacial twitterde op dinsdag 25-11-2014 om 12:19:38 #Bįršarbunga. Unless there's a data gap, the 'pause' in M3+ EQs after the M5.4 is a long one. http://t.co/eMqFzbPn7t http://t.co/w1JZyB9aMi reageer retweet

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Update
• The volcanic eruption in Holuhraun continues with similar intensity as last two weeks.
• Seismic activity in Bardarbunga continues to be strong. The biggest earthquake that was detected since noon on
Monday, was of magnitude M4,4 on Tuesday, 25. November at 23:26. Since noon on Monday 13 earthquakes larger then M3,0 and in total about 140 earthquakes were detected in Bardarbunga.
• About 20 earthquakes were detected in the dyke and around the eruption site in Holuhraun since Monday. The largest on was of magnitude M1,8.
• No signal is coming from the GPS station in the Bardarbunga caldera, the most likely explanation is icing on the antenna. A flight is scheduled over Bardarbunga today and new measurements of the depression are expected after that.

twitter:

uni_iceland twitterde op donderdag 27-11-2014 om 11:35:51 The river of lava continues to expand the lava field. It's now almost 75 km2 http://t.co/iEjtiibvIF reageer retweet

twitter:

uni_iceland twitterde op donderdag 27-11-2014 om 11:34:57 The #Holuhraun eruption has been ongoing for almost three months. Picture by our field group taken yesterday, Nov 26 http://t.co/BuOSzNdJva reageer retweet

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• Insubstantial changes have been on the volcanic eruption in Holuhraun over the last two weeks.
• Seismic activity in Bardarbunga continues to be strong. The biggest earthquake that was detected since noon on Wednesday, was of magnitude M5,1 this morning, 28. November at 06:41. Since noon on Wednesday 7 earthquakes larger then M4,0 were detected in Bardarbunga and 12 earthquakes between M3,0-3,9. In total about 170 earthquakes were detected in Bardarbunga since Wednesday.
• About 20 earthquakes were detected in the dyke and around the eruption site in Holuhraun since Wednesday. All of them were smaller then magnitude M1,0.
• About 20 earthquakes were detected in Tungnafellsjokull glacier since Wednesday. The biggest one was of magnitude M2,0.
• Scientists flew over Bardarbunga on Wednesday, 26. November. According to data collected in the flight the total depression of the Bardarbunga caldera is 50 meters and the total volume of the depression about 1,4 cubic kilometre since the seismic activity started in mid-August.
• No signal is coming from the GPS station in the Bardarbunga caldera, the most likely explanation is that the subsidence of the caldera is so great that the GPS station is now below the caldera rim and is therefore out of sight of the relay station in Kverkfjoll.

twitter:

subglacial twitterde op zondag 30-11-2014 om 10:07:22 #Bįršarbunga caldera subsidence. Excellent graphic showing ice-covered caldera along with amount of subsidence. http://t.co/muIozr5gGb reageer retweet

twitter:

subglacial twitterde op zondag 30-11-2014 om 10:19:59 #Bįršarbunga. Graphic showing the ice filled-covered caldera, along with subsidence graph. http://t.co/oAGlaOdqEQ http://t.co/EKK9A9DrW3 reageer retweet

twitter:

subglacial twitterde op zondag 30-11-2014 om 10:29:46 #Bįršarbunga. Neat! Ice subsidence asymmetry (deeper in N) + main EQ activity also in the N. http://t.co/oAGlaOdqEQ http://t.co/3lJJncWWOk reageer retweet

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• Insubstantial changes have been on the volcanic eruption in Holuhraun over the last two weeks.
• Seismic activity in Bardarbunga continues to be strong. The biggest earthquake that was detected since noon on Friday, was of magnitude M4,5 on Friday, 28. November at 22:52. Since noon on Friday 12 earthquakes larger then M4,0 were detected in Bardarbunga. In total about 200 earthquakes were detected in Bardarbunga since noon on Friday.
• About 10 earthquakes were detected in the dyke and around the eruption site in Holuhraun since Friday. All of them were smaller then magnitude M1,0. It is worth noting that the seismograph network is sensitive to wind so fewer smaller earthquakes are detected during a stormy weather like the one that has gone over Iceland in the last few days.

twitter:

uni_iceland twitterde op maandag 01-12-2014 om 13:30:52 New map of #Holuhraun lava field. It's just over 75 km2 by now and keeps growing. #Bardarbunga keeps subsiding. http://t.co/ZbqUDWLpQV reageer retweet

twitter:

subglacial twitterde op maandag 01-12-2014 om 14:15:49 And after 50+ hours of being quiet, the #Bįršarbunda caldera starts shaking again. Love it! http://t.co/eMqFzbPn7t reageer retweet

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volcan01010 twitterde op maandag 01-12-2014 om 14:52:48 #Bardarbunga Science board: http://t.co/AnLfogCCy9 Caldera subsidence rate 130m3/s (was 200m3/s in Sept). M4.5 EQ Fri. #Holuhraun continues. reageer retweet

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almannavarnir twitterde op dinsdag 02-12-2014 om 17:07:00 EO-1 ALI thermographic image from NASA and edited by @uni_iceland the volcanic eruption in Holuhraun #Bardarbunga http://t.co/vtAqrC4nCJ reageer retweet

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janinekrippner twitterde op woensdag 03-12-2014 om 12:20:03 Check out the interactive gas dispersal (SO2) map for the Holuhraun eruption, Iceland http://t.co/y0nEuFGFvN http://t.co/HfmzM7lfet reageer retweet

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• Insubstantial changes have been in the volcanic eruption in Holuhraun over the last few weeks. The lava is now also flowing towards east northeast into the small island in the centre of the lava field. This change can be seen from web cameras.
• Seismic activity in Bardarbunga continues to be strong. The strongest earthquake since noon on Monday, 8. December, was magnitude M4,9 on Tuesday at 18:00. About 20 earthquakes larger then M3,0 were detected since Monday. In total about 180 earthquakes were detected in Bardarbunga since noon on Monday.
• Little seismic activity was detected in the dyke and around the eruption site in Holuhraun since Monday. It worth noting that the storm, now going over Iceland, reduces the sensitivity of the seismograph system, making it harder to detect small earthquakes.
• GPS measurements show no changes. The subsidence towards Bardarbunga continues with similar rate as has been.
• Telecommunications with the GPS station in Bardarbunga caldera have not been established yet. Due to bad weather forecast it is unlikely that scientists will be able to travel to Bardarbunga in the next few days. A connection will be established with the GPS station as soon as possible.

twitter:

subglacial twitterde op woensdag 10-12-2014 om 10:39:08 #Bįršarbunga Great map showing growth of the #Nornahraun lava field. Fascinating! From http://t.co/oAGlaOdqEQ http://t.co/KMzLifAXra reageer retweet

twitter:

iurie_iceland twitterde op vrijdag 12-12-2014 om 20:04:11 Holuhraun. I love #aerial #photography. #iceland #nature #volcano #eruption #travel @500px @natgeo @adorama http://t.co/2HAntvgomd reageer retweet

twitter:

uni_iceland twitterde op vrijdag 12-12-2014 om 18:24:46 "It's getting (bigger) all the tiiiime“ New map of the lave field show's it's ~79 km2. #TheBeatles #Bardarbunga http://t.co/iq38kV7p86 reageer retweet

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uni_iceland twitterde op vrijdag 12-12-2014 om 16:23:19 @ESA SENTINEL-1 image of #Holuhraun this morning. The "island" that used to be in the lava field is now covered. http://t.co/deZDiyIwd1 reageer retweet

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uni_iceland twitterde op donderdag 18-12-2014 om 20:33:13 The lava from #Holuhraun eruption covers ~80 km2 by now. It reminded us of something… #Bardarbunga http://t.co/Sw3cjh6jSL reageer retweet

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janinekrippner twitterde op maandag 22-12-2014 om 10:29:03 USGS/NASA thermal image showing active lava 15 km NE from vent. Taken Dec. 20. http://t.co/7NPRM2ZXuu reageer retweet

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David_Bressan twitterde op maandag 22-12-2014 om 14:36:40 #AwesomeGeology2014 Dear journalists, remember all that hype about Bįršarbunga / Holuhraun? No mention at all now? #hypocrisy reageer retweet

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uni_iceland twitterde op donderdag 25-12-2014 om 17:10:45 We're not the only ones gaining weight this time of year. The #Holuhraun lava field keeps growing. Now ~81 km2 http://t.co/gThaBWFzBF reageer retweet

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Other discoveries

Scientists have discovered that dyke activity in Bįršarbunga volcano appears to be creating new layers of crust at depth. I don’t have the details on this , I did see this in the news few days ago, but I lost the news about what this is exactly about. I hope to get more details later about this.

twitter:

uni_iceland twitterde op maandag 05-01-2015 om 10:26:55 LANDSAT 8 satellite image from NASA & USGS showing the lava flows from #Holuhraun eruption. Still going strong http://t.co/caaohQnRgR reageer retweet