iceland Bárðarbunga and Askja - Volcanic Activity

[karyo]

5.3 !

Oh sugar! That's large! 

[Chris.R]

5.3 !

Very shallow as well, only 100 M deep.

[Ross Andrew Hemphill]

Something's bound to happen, especially with a 5.3 EQ only 100m deep!

[Dancerwithwings]

Hope so!...i don't know to much & have a very limited knowledge, but 100m, thats paper thin

[Ross Andrew Hemphill]

Quite a few big quakes today (M3+) at the caldera.

 

 

Edited September 14, 2014 by Ross Andrew Hemphill

[Ross Andrew Hemphill]

Hope so!...i don't know to much & have a very limited knowledge, but 100m, thats paper thin

I'm the same, don't know much but I know enough to say that something's happening!

[john pike]

Sunday

14.09.2014 14:06:42 64.666 -17.421 3.0 km 5.3 99.0 5.8 km ENE of Bárðarbunga

 

amended back to 3km

 

still shallow though

[NorthNorfolkWeather]

Something's bound to happen, especially with a 5.3 EQ only 100m deep!

Actually been revised to 3 km, so not quite as close to the surface. Several other quakes less than 1 km though. Wonder if the very shallow quakes are ice fracturing as it falls into water.

Hi John, beat me to it

Edited September 14, 2014 by NorthNorfolkWeather

[john pike]

no probs norfolk

 

if you can get this

 

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

 

this has now got quite a bit of ice there again which says to me ice is on the move

 

also

 

Updated information 14. september 2014 12:30 - from the Scientific Advisory Board

Scientists from the Icelandic Met Office and the Institute of Earth Sciences and representatives of the Civil Protection in Iceland attend the meetings of the Scientific Advisory Board of the Icelandic Civil Protection. A representative from The Environment Agency of Iceland was also present.

Conclusions of the Scientific Advisory Board of the Icelandic Civil Protection:

• The eruptive activity at Holuhraun continues at similar intensity. The lava flows at slower rates than it did yesterday. The lava is now spreading more to the sides and there is less visible activity is in the eruptive craters.
• The subsidence of the Bárðarbunga caldera continues and is now up to 23 meters.
• Scientists flying over the area saw new tongues of lava breaking out from the main lava stream towards the east and west. The largest one of these lava tongues stretches towards the east and had become 300 m wide and 2 km long at 18:00 yesterday. An eruption cloud reaches 4 km in height but lowers with distance from the eruption site.
• Seismic activity is similar to what it has been in the past days but earthquakes are starting to go down in numbers and magnitude. Over 60 earthquakes have been detected since midnight. Most of them have been by Bárðarbunga and the dyke under Dyngjujökull. The biggest earthquake, of magnitude 4.0, was detected today at around 07:00 in the south of Bárðarbunga. Three other earthquakes of 3.0 in magnitude or more have been detected today.
• GPS monitoring shows continuing subsidence in Bárðarbunga and insignificant crustal movements north of Vatnajökull around the dyke.

•  Air quality in urban areas in the East of Iceland:
• • High air pollution was detected yesterday in Egilsstaðir and Reyðarfjörðyour. Forecasts indicate that the gas cloud will blow towards the north in the next 24 hours. High concentrations of sulphuric gases can be expected in Mývatnssveit, Kelduhverfi, Tjörnes, Húsavík, Aðaldalur and Reykjahverfi.

• Instructions:
• • People who feel discomfort are advised to stay indoors, close their windows, turn up the heat and turn off air conditioning. Use periods of good air quality to ventilate the house. Measurements of air quality can be found on the webpage www.loftgaedi.is The Meteorological Office issues forecast on its web-page and warnings if conditions change to the worse.
  • Instructions from the office of the Chief Epidemiologist and The Environment Agency can be found on their web-sites www.ust.is and www.landlaeknir.is
  • The Icelandic Met Office will read forecasts for sulphuric gases along with weather news on the national radio and TV.
  • The Environment Agency is working on getting more measuring equipment to better monitor the gases coming from the volcanic eruption.
  • Information and any questions on air pollution can be sent to The Environment Agency through the email gos@ust.is. The Environment Agency is especially looking for information from people who have been in contact with high concentrations of gas; where they were, at what time it happened, how the gas cloud looked (colour and thickness of the cloud) and how they were affected by it. In the near future, there will be a page on the IMO's webpage for this type of information.

•  Air quality at the eruption site:
• • Gas emissions at the eruption site remain high. As local gas concentrations at the site can be life threatening, people at the eruption site should wear gas masks and gas meters. At the eruption site, local wind anomalies can occur due to thermal convection from the hot lava. This makes the conditions on site extremely dangerous as winds can change suddenly and unpredictably. Scientists in the field have gas meters for their security.

•  Three scenarios are considered most likely:
• • Subsidence of the Bárðarbunga caldera stops and the eruption on Holuhraun declines gradually.
  • Large-scale subsidence of the caldera occurs, prolonging or strengthening the eruption on Holuhraun. In this situation, it is likely that the eruptive fissure would lengthen southwards under Dyngjujökull, resulting in a jökulhlaup and an ash-producing eruption. It is also possible that eruptive fissures could develop in another location under the glacier.
  • Large-scale subsidence of the caldera occurs, causing an eruption at the edge of the caldera. Such an eruption would melt large quantities of ice, leading to a major jökulhlaup, accompanied by ashfall.

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

 

Other scenarios cannot be excluded.

 

still as we were

[john pike]

The Icelandic Met Office warns of possible high concentration of sulfur dioxide in the atmosphere in North Eastern Iceland today, due to the Holuhraun lava eruption. The area around the eruption was completely closed off today because of dangerous levels of gas, emanating from the lava.

 

http://www.ruv.is/frett/volcanic-haze-expected-in-ne-iceland-today

[Buckster]

wooah - is she dropping that quick or an error in recent plots ?

 

http://brunnur.vedur.is/pub/vatnavakt/bardarbunga/

 

nearly 50cm since midnight ?

[Buckster]

actually about "normal" for this recent activity I think

 

about 80cm a day - so 50cm since midnight about right

[swebby]

All the tremor plots in the area have shown an increase in activity earlier today but it looks like that may be quietening down now.

 

The cycle seen in the dyn station plot (ca 24-36hr period), is this what people mean when they say the volcano is breathing?

 

[The PIT]

It'll be interesting too see how close the big drops coincide with the earthquakes.

[karyo]

According to Jon Frimman's latest update the eruption at the fissure is coming to an end and the lava has stopped progressing towards the river.

[Yarmy]

According to Jon Frimman's latest update the eruption at the fissure is coming to an end and the lava has stopped progressing towards the river.

I don't see that, Karyo? His last post is talking about 20km high ash clouds and the largest Icelandic eruption in 1000 years. He's either on to something or he's flipped and gone full Madden.

[Rustynailer]

Looks like a fresh eruption in the background Mila 1, the edge of the glacier, almost certain.

 

Yes I think it is that black cloud in the background is rising too fast.  

 

I think there is a lot of steam as it has just got through the ice, stand by for some evidence of hot stuff.

 

Jon Frimann is not sure, Carls lot say no, I am still not 100% but I thing we will find out in the morning on the ice near the fissure.

Edited September 14, 2014 by Rustynailer

[john pike]

earthquake rates remain stable compared to recent days, around 140 events have been detected since midnight (until now 18:50). Most events concentrate in the northernmost part of the dyke intrusion, from the eruption site to about 6 km into Dyngjujökull. Earthquakes in the intrusion hardly exceed magnitude 2. There are still several earthquakes located on the Bárðarbunga caldera rim, one of magnitude around 5 today at 14:06 on the northern rim, five of magnitude 3-4. A small series of events occurred around 17:00 close to Dreki (east of Askja), all events lower than magnitude 1.5. Stable subsidence is seen on the GPS in the Bárðarbunga caldera, crudely 50-60 cm since midnight. A short step of 10-15 cm lowering might be associated with the 14:06 earthquake.

 

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

Edited September 14, 2014 by john pike

[Allseasons-Si]

Looks like a fresh eruption in the background Mila 1, the edge of the glacier, almost certain.

 

Yes I think it is that black cloud in the background is rising too fast.  K158.JPGK159.JPG

 

I think there is a lot of steam as it has just got through the ice, stand by for some evidence of hot stuff.

Hi rusty

 

it's just cloud in front of the glacier

 

evaporation from the lava field below,if there was a eruption,it would fill the entire screen/webcam

 

hope that settles some nerves lol.

 

just to add though

 

the gps graph has taken a tumble,a new piece of A4 is required again

 

http://brunnur.vedur.is/pub/vatnavakt/bardarbunga/

 

a final note rusty,i asked yesterday,how do you screengrab the cams

Edited September 14, 2014 by Allseasons-si

[karyo]

I don't see that, Karyo? His last post is talking about 20km high ash clouds and the largest Icelandic eruption in 1000 years. He's either on to something or he's flipped and gone full Madden.

hi Yarmy,

 

click the link http://www.jonfr.com/volcano/?p=4965   and go on the 14 September update. Jon is not saying that the danger has passed, he is only saying that the fissure eruption is ending. He is still expecting Barda to collapse.

[Allseasons-Si]

A dramatic uptick in the caldara in the past 15 minutes

 

http://brunnur.vedur.is/pub/vatnavakt/bardarbunga/

 

what does this tell us,that the magma is pushing closer to the surfice?

[Yarmy]

hi Yarmy,

 

click the link http://www.jonfr.com/volcano/?p=4965   and go on the 14 September update. Jon is not saying that the danger has passed, he is only saying that the fissure eruption is ending. He is still expecting Barda to collapse.

Cheers, I see it now.

[NessCottage]

A dramatic uptick in the caldara in the past 15 minutes

 

http://brunnur.vedur.is/pub/vatnavakt/bardarbunga/

 

what does this tell us,that the magma is pushing closer to the surfice?

Or ice melting underneath .... or an instrumentation issue... or something else?  Had just noticed it

[NessCottage]

Looks like it is an instrument issue caused by weather/local conditions

[Jonathan Lang]

Can see a sharp drop by the end of the chart from the link Allseasons-si provided. Interesting...