iceland Bárðarbunga and Askja - Volcanic Activity

[Rustynailer]

South of the crater? Is that anywhere near any of the magma movements have been detected?

First all the quakes at or near Bada in the last 24 hours. Second all the quakes of the event, oh no not Grims.... That is as far as detection goes apart from the flight and the tremor readings, Ill get those in a mo.....

 

http://hraun.vedur.is/ja/oroi/grf.gif There no sign, but there would not be if there was no resistance. Grim makes that blue trace right across the page when she goes like 2011.http://hraun.vedur.is/ja/drumplot/IGRF.png

Edited August 27, 2014 by Rustynailer

[Allseasons-Si]

South of the crater? Is that anywhere near any of the magma movements have been detected?

I was just wondering that myself

 

just got in from work and to see that big crack posted above made me go

 

it does seem a bit eiry that not much has happened EQ wise today,maybe the magma has hit a steal wall or something,i dunnow,i am confused with all this.

 

the calm before the eruption!.

[Rustynailer]

http://ruv.is/frett/rifts-spotted-in-ice-cap There may be more to this as the evening turns to morning.....

[john pike]

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

A cauldron/low was observed in the glacier at 64°34,80' N og 17°21,30' W. The cauldron seems to be shallow, but many small crevasses/fractures. Ice thickness probably 400-600 m. Possibly 1-2 other cauldrons/lows but unconfirmed, one ~2 km SSE of the largest one, the other 2 km to the NNW. This is approximately where the dyke extends from, ESE of the caldera itself. Also likely that there are extensional fractures on the surface in the lava N of the glacier.

Certainly having an effect

Question is. What happens next?

[Moomin71]

I was just wondering that myself

 

just got in from work and to see that big crack posted above made me go

 

it does seem a bit eiry that not much has happened EQ wise today,maybe the magma has hit a steal wall or something,i dunnow,i am confused with all this.

 

the calm before the eruption!.

I think Rustynailer probably summed it up, it is most likely due to lower resistance either the fissures are more open now or, as the dramatic photos suggest the surface cracking is leading to a reduction in pressure.  If it was a reduction in the volume of magma I think we'd see a much bigger drop in the number of earthquakes, whereas the frequency doesn't seem to have reduced that much just the magnitude.  It can't be long now before it erupts, just have to see if it will interact with Askja or not and if the central volcano will play a part or not.  Very impressive photos, sort of stuff nightmares are made of, reminds me of that film from the 1950 I think where the earth was going to be split in two unless some mad geologist launched a nuclear missile down a mine shaft, bonkers film very enjoyable though, lots of scary cracks appearing and disasters happening, anyway somewhat off topic there.  Will have to see how things are in the morning.

 

M

[Allseasons-Si]

http://ruv.is/frett/rifts-spotted-in-ice-cap There may be more to this as the evening turns to morning.....

I was just about to post that article lol.

[Buriedundersnow]

Gisli Olafsson â€@gislio 1m

From @Vedurstofan - here are the coordinates of the 4 cauldrons - 64°33,2N 17°21,8V 64°33,8N 17°23,5V 64°34,2N 17°24,4V 64°34,6N 17°25,7V

[Rustynailer]

http://en.vedur.is/earthquakes-and-volcanism/articles/nr/2947A cauldron/low was observed in the glacier at 64°34,80' N og 17°21,30' W. The cauldron seems to be shallow, but many small crevasses/fractures. Ice thickness probably 400-600 m. Possibly 1-2 other cauldrons/lows but unconfirmed, one ~2 km SSE of the largest one, the other 2 km to the NNW. This is approximately where the dyke extends from, ESE of the caldera itself. Also likely that there are extensional fractures on the surface in the lava N of the glacier.Certainly having an effectQuestion is. What happens next?

Expect the unexpected, or big outburst of melt water from the glacier like 1996 Gjalp. The eruption is a rift I think, long and slow to get going. Looks like it could stretch from Askja to South of Bada at somewhere near where the 1996 Gjalp eruption was when it gets going, if it does not stall. Somehow I think that Bada is draining its magma into this deep rift and may cause quite a volcanic mess. 

Europe's largest glacier has a rift right through the middle quite possibly and also a very large ring faulted volcano thats having Mag fives. 

If nothing happens then I am a Dutchman.

[Buriedundersnow]

I was just about to post that article lol.

 

 

look at the pic I posted further up the page its opened more than that now

[Gael_Force]

From one of the geologists on the flight.

 

"

Magnús Tumi Guðmundsson of the Institute of Earth Sciences , writes after a flight with TF -SIF :

Southeast of Bárðarbunga – some cauldrons , shallow but large, 4 to 6 km in length with ring fractures .Coordinates – are about one km east of the recesses :64 ° 17 ° 33.2 21,8V64 ° 17 ° 33.8 23,5V64 ° 17 ° 34.2 24,4V64 ° 17 ° 34.6 25,7V

Ring cracks are about one km long . Ten to fifteen cracks around each cauldron , estimate sunk 10-15 m in the centre. This information is not quite complete, not excluded that cauldrons are forming in more places , but visibility and darkness would not allow more precise or more inspections .

 

Translation from  http://www.vedur.is/skjalftar-og-eldgos/frodleikur/greinar/nr/2940

[Buriedundersnow]

which one is going to go or maybe all three?

 

Gisli Olafsson â€@gislio 6m

Dept of cauldrons is around 10-15m - the cauldrons form a 4-6km long “crack†- SE of #Bardarbunga caldera - water would go to Grimsvotn

[Allseasons-Si]

look at the pic I posted further up the page its opened more than that now

Yeah,looked at it earlier Buried,i didn't expect it SE of barda though,my first thoughts would of been NE.

Edited August 27, 2014 by Allseasons-si

[Rustynailer]

Bada as far as is known is sat right on top of this rift, and the rift is the same rift that runs right up the middle of the Atlantic. This is what she always does its just that we have never been able to see in the instrumental/modern age do its thing, so we know something big could happen, this time we wont be examining the aftermath and concluding what happened we will already know.

 

http://www.almannavarnir.is/displayer.asp?cat_id=8&module_id=220&element_id=3187 Statement in Icelandic saying its official about those air photographs of the glacier cracks cauldrons etc(we have not seen them yet) I think I have not Google translated as that is not good in Icelandic

 

 

Looking at this I think there may have been another 3+ green star at or near Askja, I am not entirely sure but anyhow.....About 2245Z on that which is 2345Z here

Edited August 27, 2014 by Rustynailer

[Allseasons-Si]

A sat view of the crack

 

https://twitter.com/Bromotengger/status/504613306368552960/photo/1

[john pike]

I am still going for a partial collapse of baroarbunga

What happens with the dyke i have no idea but its

Certainly not looking too clever at present

[Rustynailer]

A sat view of the crack

 

https://twitter.com/Bromotengger/status/504613306368552960/photo/1

Grímsvötn that's the crack on the sat photo it happened in 2011.

I think there is no satellite phots on the net showing this event yet. 

Edited August 27, 2014 by Rustynailer

[Allseasons-Si]

Grímsvötn that's the crack on the sat photo it happened in 2011.

I think there is no satellite phots on the net showing this event yet. 

it does show 05:56 am on that photo,soz.

[Rustynailer]

Jon frimann has just posted 

• The cauldrons are 4 to 6 km long and about 1 km wide. OMG

 

http://www.jonfr.com/volcano/

Edited August 27, 2014 by Rustynailer

[Allseasons-Si]

I have just run an hourly intervals on the http://baering.github.io/

 

(on the map)

 

and thinking that the EQ's/tremors are more concentrated in the center of the dyke than heading NE to askja,maybe entering a fishure eruption,maybe someone can correct me if i am wrong.

 

Edit:

  2.6 7 minutes ago 0.9km @barda Edited August 28, 2014 by Allseasons-si

[Rustynailer]

it does show 05:56 am on that photo,soz.

It is easy done as things are moving so fast.

 

I think these blue EQ dots just NW of Grims are near the cauldrons or are connected somehow. It is a small EQ swarm early on in the event a fissure.....

 

Just had around a Mag 5 EQ cant tell where yet. See second pic

Edited August 28, 2014 by Rustynailer

[Allseasons-Si]

It is easy done as things are moving so fast.

 

I think these blue EQ dots just NW of Grims are near the cauldrons or are connected somehow. It is a small EQ swarm early on in the event a fissure.....

The media,too fast,

 

the bardabunga too slow,lol

[Rustynailer]

The media,too fast,

 

the bardabunga too slow,lol

I love the way we can find all this out so quick.

 

That EQ is over Mag 5 I think(see above updated post for pic) look at Vat top right that red line is big.

Edited August 28, 2014 by Rustynailer

[Allseasons-Si]

I love the way we can find all this out so quick.

 

That EQ is over Mag 5 I think(see above updated post for pic) look at Vat top right that red line is big.

got it

 

EMSC got it at 4.2 @ 33km deep,maybe not verified yet.

 

5.4 on IMO

[Buriedundersnow]

Univ. of Iceland â€@uni_iceland 6m

No obvious signs of volcanic eruption yet (no harmonic waves or earthquakes that point to an ongoing eruption) #Bardarbunga More info 2MRW

 

Univ. of Iceland â€@uni_iceland 10m

30-40 million m3 of ice melted when the sinkholes formed. Water might have flowed into #Grimsvotn Another surveillance flight 2MRW morning

 

picture showing position of depressions

 

[Buriedundersnow]

got it

 

EMSC got it at 4.2 @ 33km deep,maybe not verified yet.

 

5.4 on IMO

 

the one on IMO is 24hrs ago