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Bárðarbunga and Askja - Volcanic Activity


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hi again guys

Below is the o/n GPS.

It is my first attempt at a link, so please forgive the standard of the blog

barc_gps_3d_is.png?id=1411231047

MIA

PS How do you get the picture to display automatically?

 

Hi MIA - I've done it for you - just click the image symbol and when box pops up, insert image link in there and press OK.

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I am still trying to understand what is happening here but there does seem to be a little confusing information going on. Before I express any thoughts, understand that I am not a volcanologist and th

Did you see the beautiful picture with the eruption glow and northern lights giving surreal lighting effects.   The eruption seen from Jökulsarlón south of Vatnajökull glacier.  (Martin Schultz,

This is my favourite (from elsewhere) to date - very atmospheric.  

Posted Images

Bárðarbunga Magma Closer to the Surface By Páll Stefánsson November 24, 2014 09:41

bardarbunga_vatnajokull.jpg?itok=72RQP90

Bárðarbunga. Photo: Páll Stefánsson.

The first data received from new seismographs put up on Bárðarbunga volcano, which lies under Vatnajökull glacier, last week, shows that the magma is much closer to the surface than previously thought.

The earthquakes occur at a depth of only three kilometers (1.8 miles), not five to eight as scientists had assumed. “The Bárðarbunga magma chamber system is much more complicated than we thought,†geophysics professor Magnús Tumi Guðmundsson told mbl.is.

The new data shows that the ice on top of the Bárðarbunga caldera, which has been sinking slowly but steadily ever since the eruption in Holuhraun started in late August, is thinner than previously thought.

The lava which is erupting in Holuhraun north of Vatnajökull is coming up from at least nine kilometers (5.5 miles) under the surface.

 

http://icelandreview.com/news/2014/11/24/bardarbunga-magma-closer-surface

 

 

http://en.vedur.is/media/jar/Factsheet_Bardarbunga_20141124.pdf

 

update from iceland scientific board

 

 

http://www.livefromiceland.is/webcams/bardarbunga/

 

still viewable and looking lively still

Edited by john pike
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The fissure eruption seems to be getting bigger.

I think you are right as it appears at the moment. This mornings 5.4 may have made the lava run, faster, thinner and hotter, possibly, not sure... Try the video above, runnier and faster than that I suppose.

Being hotter is is looking brighter too. Not 100% on this but that what it looks like. Less resistance from runny lava means less EQ's also. Although IMO sometimes processes EQ's in big batches when its busy. But looking at the EQ graph it looks like a fall in overall magnitude averages since the 5.4

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M 4.5 - JAN MAYEN ISLAND REGION - 2014-11-25 09:01:53 UTC

 

M 4.4 - JAN MAYEN ISLAND REGION - 2014-11-25 09:04:33 UTC

410366.global.thumb.jpg

http://www.emsc-csem.org/Earthquake/earthquake.php?id=410366#map

 

a couple of quakes close to iceland that may have a bearing on the plates there

 

updates 3+ today

 

Tuesday
25.11.2014 13:14:26 64.670 -17.443 2.5 km 3.8 99.0 5.2 km NE of Bárðarbunga Tuesday
25.11.2014 10:20:43 64.658 -17.355 4.1 km 3.8 99.0 8.4 km ENE of Bárðarbunga Tuesday
25.11.2014 06:23:05 64.674 -17.445 9.9 km 4.0 99.0 5.4 km NE of Bárðarbunga

plus

Tuesday
25.11.2014 14:11:56 64.620 -17.430 1.1 km 3.7 50.5 5.2 km ESE of Bárðarbunga

which is waiting review

 

Tuesday
25.11.2014 14:11:56 64.618 -17.464 2.4 km 4.2 99.0 3.9 km SE of Bárðarbunga

now reviewed

 

certainly less quakes since the 5.4 although this does not mean this is slowing down

it can also mean magma is moving easier without much resistance

 

mo update

 

25 November 2014 10:00 - from geoscientist on duty

Since kl. 10:00 yesterday, 24 November, around 70 earthquakes have been detected within Bárðarbunga. Similar to yesterday, most of the seismicity is occurring on the northern side of the volcano's caldera. Of the 70 detected earthquakes, at least 11 are sourced from the northern part of the dyke intrusion under Dyngjujökull.

The largest detected earthquake since yesterday's report was around magnitude 3.8. At least eight other earthquakes exceeded three in magnitude.

Overall, the level of earthquake activity is lower than in recent days. This trend has been observed several times since the Holuhraun eruption began.

Please note that the GPS station on Bárðarbunga is off-line at the moment due to a communication problem.

From web-camera views of Holuhraun, the eruption continues unabated.

http://en.vedur.is/earthquakes-and-volcanism/articles/nr/2947

 

again its a watch and see what happens still

 

http://www.livefromiceland.is/webcams/bardarbunga/

 

http://www.livefromiceland.is/webcams/bardarbunga-2/

 

cams are viewable at present

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M 4.5 - JAN MAYEN ISLAND REGION - 2014-11-25 09:01:53 UTC

 

M 4.4 - JAN MAYEN ISLAND REGION - 2014-11-25 09:04:33 UTC

410366.global.thumb.jpg

http://www.emsc-csem.org/Earthquake/earthquake.php?id=410366#map

 

a couple of quakes close to iceland that may have a bearing on the plates there

 

 

Yes I think so, it erm, agitates things I have been noticing this relationship for a few years now, lots of people across the interweb disagreed in the past when people mentioned this effect.

Less so these days, probably because its true.

 

 

Position of the green stars since yesterday dinner.  post-4726-0-00190100-1416935893_thumb.jp

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I think the fissure is a large source of heat energy, more than all thye nuclear stations... Shame nobody is cleaver enough to use it,,,http://www.livefromiceland.is/webcams/bardarbunga-2/

 

post-4726-0-33198000-1416943592_thumb.jp

 

Thye LOL sounds old fashioned, slip of the fingers...

 

 

post-4726-0-79223700-1416943942_thumb.jp still breaking rock.

 

 

 

Edited by Rustynailer
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I think the fissure is a large source of heat energy, more than all thye nuclear stations... Shame nobody is cleaver enough to use it,,,http://www.livefromiceland.is/webcams/bardarbunga-2/

 

attachicon.gifK340.JPG

 

Thye LOL sounds old fashioned, slip of the fingers...

 

 

attachicon.gifK341.JPG still breaking rock.

Is that with the cleaver? lol

 

Edit: Sorry - just back off hols from Lanzarote - The island is pure volcano!

Edited by frogesque
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Is that with the cleaver? lol

 

Edit: Sorry - just back off hols from Lanzarote - The island is pure volcano!

I can see now, tsk :nonono:

 

 

Glasses r good post-4726-0-48924600-1416948566_thumb.jp

 

Creep to the front on the valar... suggestive of what?  post-4726-0-92948500-1416950384_thumb.jp Long difference between waveform arrival times, or receiver distortion...

 

Thanks IMO for such interesting data.

Edited by Rustynailer
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Since 8 last evening

 

 

Wednesday
26.11.2014 13:14:26 64.670 -17.460 1.1 km 4.3 50.5 4.6 km NE of Bárðarbunga Wednesday
26.11.2014 06:25:07 64.678 -17.466 8.2 km 3.9 99.0 5.2 km NE of Bárðarbunga Wednesday
26.11.2014 04:59:21 64.661 -17.504 7.9 km 4.0 99.0 2.6 km NNE of Bárðarbunga Wednesday
26.11.2014 03:38:27 64.673 -17.465 6.5 km 4.1 99.0 4.7 km NE of Bárðarbunga Wednesday
26.11.2014 00:23:30 64.667 -17.467 5.1 km 3.8 99.0 4.2 km NE of Bárðarbunga Tuesday
25.11.2014 23:26:20 64.670 -17.387 3.0 km 4.4 99.0 7.4 km ENE of Bárðarbunga Tuesday
25.11.2014 20:55:29 64.666 -17.467 5.0 km 3.7 99.0 4.1 km NE of Bárðarbunga

 Not many really and lastest 4.3 to be verified

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updated information 26 November 2014 14:00 - from the Scientific Advisory Board

Notes from the Scientific Advisory Board (pdf 0.4 Mb)

Now 74 square km
LANDSAT8_20141125_2207.jpg
Landsat 8 thermal image 25 November 2014 at 22:07 from NASA and USGS. The extent of the lava is now 74 km². According to a field report, the activity is pulsative again. Lava is thrusted from the vent in frequent surges, lasting 2-3 minutes every 5-10 minutes, causing bulges along the upper stretches of the lava channel. These surges seem to be related to bubble bursts at the northern end of the lava lake. Institute of Earth Sciences.
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Been out all day.

The dyke has a newly formed caldera at its head. But this seems to have split and it seems to be allowing the molten flaming lava round down the dyke. At times in its pulsation cycle the old caldera is obscurred from view by the flames emerging from the dyke.

It certainly doesn't look to be subsiding.

MIA

Edited by Midlands Ice Age
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Wednesday

26.11.2014 18:53:12 64.674 -17.376 4.1 km 4.4 99.0 8.1 km ENE of Bárðarbunga Wednesday

26.11.2014 18:52:38 64.667 -17.457 1.5 km 3.5 99.0 4.5 km NE of Bárðarbunga

http://en.vedur.is/earthquakes-and-volcanism/earthquakes/#view=table

 

pretty close together them

 

heres something odd

 

http://en.vedur.is/#tab=vatnafar

 

very high flow at svarta

 

but very low flow at laxa

 

most odd

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A few over three today

 

 

Thursday
27.11.2014 14:48:48 64.669 -17.438 4.0 km 4.0 99.0 5.4 km NE of Bárðarbunga Thursday
27.11.2014 11:23:24 64.664 -17.398 3.2 km 4.2 99.0 6.7 km ENE of Bárðarbunga Thursday
27.11.2014 08:06:27 64.624 -17.403 6.9 km 4.5 99.0 6.2 km ESE of Bárðarbunga Thursday
27.11.2014 07:31:44 64.673 -17.483 7.9 km 3.6 99.0 4.2 km NNE of Bárðarbunga Thursday
27.11.2014 05:46:21 64.619 -17.469 11.3 km 3.6 99.0 3.7 km SE of Bárðarbunga Thursday
27.11.2014 04:56:51 64.669 -17.495 6.2 km 3.5 99.0 3.5 km NNE of Bárðarbunga Thursday
27.11.2014 03:03:45 64.681 -17.417 7.6 km 3.4 99.0 6.9 km NE of Bárðarbunga Thursday
27.11.2014 00:35:12 64.659 -17.505 6.2 km 4.4 99.0 2.3 km NNE of Bárðarbunga
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New IR Photo of Holuhraun Lava River By Eygló Svala Arnarsdóttir November 27, 2014 09:36 Updated: November 27, 2014 11:09

holuhraun_lava_river_261114.jpg?itok=KKh

The lava river. Photo: Páll Stefánsson.

Iceland Review editor and photographer Páll Stefánsson flew over the volcanic eruption in Holuhraun, the northeastern highlands, along with Morgunblaðið photographer Ragnar Axelsson (aka RAX) yesterday. It was Páll’s fifth trip to the eruption site. They observed a red hot river of lava flowing through blackened lava fields.

“It’s a massive eruption and even though we have started noticing some changes to it, the activity is still intense,†volcanologist Ãrmann Höskuldsson at the University of Iceland Earth Science Institute said in an interview with mbl.is today. 

bardarbunga_vatnajokull_glacier.jpg?itokBárðarbunga volcano looked peaceful under the pristine white Vatnajökull icecap. Photo: Páll Stefánsson.

Last week scientists observed fluctuations in the volcanic plume with powerful jets being emitted sporadically. They also noted pulsing in the lava flow.

The intensity of the eruption has declined and the lava flow is now only a quarter of what it was when the eruption was at its most intense stage. Yet 60-100 cubic meters (2,119-3,532 cubic feet) of lava are currently being emitted every second.

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nothing overnight of any note then these two this morning

 

 

Friday
28.11.2014 06:16:01 64.673 -17.436 1.1 km 3.1 90.1 5.7 km NE of Bárðarbunga Friday
28.11.2014 06:14:02 64.674 -17.464 6.9 km 5.1 99.0 4.8 km NE of Bárðarbunga
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Updated information 28 November 2014 11:30 - from the Scientific Advisory Board

Scientists flew over Bárðarbunga on Wednesday, 26 November. According to data acquired in the flight, the total subsidence of the caldera is 50 meters and the volume is 1.4 cubic kilometers. No signal is now received from the station in the caldera and the most likely explanation is that

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.

 

http://en.vedur.is/media/jar/Factsheet_Bardarbunga_20141128.pdf

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