Volcanic Iceland: Earthquake with magnitude M 5,2 in Þorbjörn mountain (Fagradalsfjall mountain)!!!p1492

ANYHOO! VOLCANO CAFE UPDATE

[link to volcanocafe.wordpress.com]

So, what will most likely happen at the caldera? For starters, it is normal for rapidly deflating large magma chambers to cause deflation caldera formations. Normally this does not lead to an eruption, or lead to just small eruptions since a deflating caldera floor is a sign of loss of pressure.

In this case we need to take into account that there are two large pools of water below the ice over the caldera floor, and that the ice in and of itself can rapidly transform into water. If that water finds a way down into the extremely hot magma reservoir the water will instantly transform into supercritical steam and a steam explosion will occur. In that case pure physics take over; if a small amount of water hits a small area of hot material a fairly benign explosive event happens. If a large amount of water hits a small area of hot material a prolonged event follows. If a small amount of water hits a large area of hot material a short rapid explosive event happens. And if a large amount of water finds a large area of warm material I would prefer to be more than 50 kilometers away.[/i]

WHEWWWWWWWW......

Now, where has all of this magma gone? Well between one quarter and one third has erupted out through the fissures. The current estimate is that between 250 and 300 million cubic meters have come out of all of the fissures so far. And that would leave between 500 and 750 million cubic meters inside the rifting fissure extending from Bárdarbunga Central Volcano.

and for all the troll saying its all dying down due to lack of earthquakes.........

A short note on the diminished amount of earthquakes. This is fully to be expected since the earthquakes are mainly a sign of increased pressure in a fissure system as magma pushes apart rock. Now that the fissures have opened the pressure will be more constant and no new rock would need to be ripped apart by the magma.

[link to volcanocafe.wordpress.com]

[link to tinypic.com]

While there may be some increase in the volume of smoke, there does not appear to be any real difference, or any reason for a difference, in its composition. The darkening is probably just lighting affects from the inclination of the sun.

Saturday
06.09.2014 14:32:14 64.622 -17.399 11.6 km 4.4 99.0 6.5 km ESE of Bárðarbunga

that means trouble

one more thing about that VC piece..

Now that we have covered the options of water dumping into the magma reservoir we should briefly discus Jökulhlaups. For Bárdarbunga it would take quite a lot for it to cause a Jökulhlaup directly from an explosive event at the Caldera since there is not natural way for the water to leave.

read that again!

there is not natural way for the water to leave.

do you know what this means?

that caldera is like a gigantic pot, with NO nozzle. water can't get out of it.

if a crack occurs in the caldera roof, it is very likely the resulting eruption will widen it, and every last drop of water melted will make it's way down to the magma chamber, bigger eruption, bigger hole, more water down, until a final cataclysmic explosion as the magma chamber is flooded by millions of gallons of meltwater

there is NOWHERE ELSE for the water to go!!

now that the caldera is dipping because of a lack of pressure, when will the rock fail? that will be the key moment imho.

416.

let's say there are 40 billion tons of ice in the caldera, conservatively

there are 240 gallons of water to a ton of ice, so 9,600,000,000,000 gallons of water are in the caldera

over 9 and a half trillion gallons?

[link to jardvis.hi.is]

and counting.......

Great find, great map.
Thank you.

like obamas debt ?

Thread: Volcanic Iceland: Earthquake with magnitude M 5,2 in Þorbjörn mountain (Fagradalsfjall mountain)!!!p1492 (Page 361)



yeah, but if you dump all that water in, will it clear THE LOT out?

:damed:

holy shit!

Luis, that map needs to go on page one, and update the thread title

damed!

Already did...

Can someone explain what that map is showing. My icelandic isn't much good these days.....

a slump in the ice in the caldera

the deeper the red, the deeper the part of the slump

Stephen Hicks @seismo_steve · 12 min
As also shown by earthquake mechanisms, #Bardarbunga caldera is rapidly subsiding. Dark red: deepest. HT @RUVfrettir: [link to twitter.com (secure)]

Irpsit September 6, 2014 at 15:21
Great post Carl.

I am definitively looking for 4 things happening or that might happen at Bardarbunga:

1) Very likely we will see in soon a new fissure forming to the south of the current ones, under the Dyngjujokull ice cap. This might result in a minor explosive or nothing visible, if eruption has no pressure to break all the thick ice. If that eruption breaks the ice, then it would form a ash cloud, but not a large one.

2) A glacial flood would almost likely follow if such an eruption occurs. And it would run over the current eruption sites (something probably astonishing to see with the webcams).

I actually don’t understand why we haven’t seen one yet, in face of so much evidence for a subglacial fissure eruption. Speulation alert: The glacial flood could well occur sometime this week.

3) Quite likely we might also see some sort of explosive eruption, at the Bardarbunga caldera itself. After all, the caldera erupted one month after a M5 quake in 1996, why wouldn’t now?

This is a more worrying scenario. The current ongoing collapsing caldera will likely result in some leakage of magma to the surface, which probably doesn’t break through the ice cap but water would contact magma, resulting in a steam explosion, Maybe this already happened in the cauldrons detected near the caldera southern edge. Usually such a subglacial event would carve a cave under the glacier, but a large event would cause the collapse of the glacier over it, and result in a larger steam explosion. At that point, a small explosive eruption would occur, but due to the fragility of the sinking caldera, water could start to leak more into the magma chamber and trigger what we all fear: a major plinian eruptiojn linked to the collapsing caldera.

4) last it’s another another development that worries me. It’s the amount of released SO2. I was shocked to feel SO2 from 100km afar. That means, that at current rate in about 4 weeks all across Iceland would be detecting sulphur gas, if wind would keep changing direction and spread the gas around. While not Laki scale, just 0.5 km3 of erupted magma, would be roughly 30 times less sulphur gas, which is still quite a significant amount of gas around.

Reply
Irpsit September 6, 2014 at 15:26
And quite a lot of gas visible just now in Bardar webcams. But I wrote this not based in this, but in the report of yesterday, feeling SO2 from quite away. That means its a huge amount of SO2 being released at the moment. I reckon that anyone close to the eruption site there, would be at least sick from its lungs.

How can they make flight tours with such a gas cloud? [link to volcanocafe.wordpress.com]

THANK YOU ALL FOR THE PEACE YOU GAVE ME.

Life is tough and will get tougher.

Thank goodness there are still good people here on earth.

We are all watching this event unfold before our own eyes. How beautiful is that??

The beautiful people on this thread since the beginning show ME that humanity can and WILL survive.

Bless you all and let all of us watch in wonderment the beauty of the universe together.

Peace be with you.

Cam 1
[link to i.imgur.com]

Cam 2
[link to i.imgur.com]

Saturday
06.09.2014 14:32:14 64.622 -17.399 11.6 km 4.4 99.0 6.5 km ESE of Bárðarbunga

Thank you for your redular images - much appreciated by those of us who struggle to see the cams.

What is that green orb towards the top and middle of the frame?

[link to i.imgur.com]

Yeah, and look at that M3.0 at the surface!

With a 15-20 meter drop in the caldera ... overnight!

( [link to volcanocafe.wordpress.com]

Oh, she's getting close ... REAL CLOSE!

Now its gone

[link to www.livefromiceland.is]