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Shell Rawcliffe

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    Convective/Storm Discussion Thread 25/5/16 onwards

    in Storms & Severe Weather

    Posted · Edited by Shell Rawcliffe

    7 minutes ago, Wet'n'Dry said:

    I would love to see some pileus clouds if anyone manages to capture one. I've not seen one in years!!

    Not too sure if this counts it is even the type of cloud your after, took it because it was unusual the updraft seemed to climb then the blanket formed on top and it then began to flatten out. 

    This was on the Preston cell.

     

    image.jpeg

    • Like 4

    Bárðarbunga and Askja - Volcanic Activity

    in Space, Science & nature

    Posted

    I would think they will as major changes like that to the area will need constant monitoring.

     

    It is quite amazing how this keeps changing and evolving on a day to day basis. It will provide so much new information to go through and learn from for future eruptions in the area. 

     

    And not just for the scientist either, but for everyone who has any kind of interest in volcanoes.

    Bárðarbunga and Askja - Volcanic Activity

    in Space, Science & nature

    Posted

    Amazing video and just to think its a smaller volcano, what could happen is this volcano blows its top. Quite like the music :rolleyes: 

     

    Take it thats what happens when you mix magma with ice/water Spectacular.

     

    @Mousehole1 local scientists are perplexed and worried - unprecedented movement of material beneath surface

     

    Seems that this has got some people concerned about what may happen next.

     

    Also looking at the IMO site i noticed a group of earthquakes at another volcano. Anything to note?

     

    140906_1245.png 

    Bárðarbunga and Askja - Volcanic Activity

    in Space, Science & nature

    Posted

    An extract from an article on Volcano cafe. Its about the potential eruption at the caldera and the ring faults.

     

    Since the appropriate Icelandic authorities have today publicly mentioned the possibility of a large, acidic and explosive eruption at Bardarbunga, we now feel free to inform you that this possibility has been discussed by the Dragons, behind closed doors, for well over a week. The key information comes from this official IMO graphic:

     

    The first premise is that earthquakes do not occur in molten rock. Nor do they form a clearly visible ring shape such as the above except under one circumstance – they do so around a body of liquid, in this case magma. A conservative estimate places the size of this body of magma at 8 km diameter, height unknown but most likely on the order of 3 – 6 km, depth also unknown but relatively shallow. Using simple geometry, 4 x Pi x r3 / 3 yields a volume of ~250 cubic kilometres for a sphere, but for our flattened body something on the order of 125 – 140 cu km.

     

    The link is here http://volcanocafe.wordpress.com/2014/09/03/bardarbunga-update-20140903/

    Bárðarbunga and Askja - Volcanic Activity

    in Space, Science & nature

    Posted

    the ones in the caldera will be from the magma chamber breathing as such think of a lung it will be taking in magma (breathing in) then ejecting it along the dyke to the fissure (breathing out) and we should get periodic earthquakes as the chamber empties into dyke which is bount to be fracturing the caldera roof as it does this.

     

    to the north of the glacier and that will partly be the fissure still working open and from the flow of magma and the force of it leaving the fissure.

     

    the more important bit to be watching is to the northeast of ASKJA this is a separate fissure and where we have EQ activity earlier in the year and there could be a chance that magma is coming up through the whole system from BARDARBUNGA right up past ASKJA just its finding it harder in the ASKJA area now if these two fissure systems link and come open it will blow ASKJA as well.

     

     

    Thanks for the reply,

     

    This thread is great for improving my understanding of the complex and dynamic things going on.

    Bárðarbunga and Askja - Volcanic Activity

    in Space, Science & nature

    Posted

    is it just me or are the EQ'S now becoming more concentrated on 3 areas.

     

    1) the caldera itself

     

    2) in the extrusion to the north of the glacier

     

    3) at the northern edge of the dyke.

     

    with No3, could it be a result of less pressure in  the dyke as the magma now has an exit route, or that there could still be magma extending the dyke making it longer.

     

    Just noticed when looking at the 3d bulge maps for the last 16hrs.

    Bárðarbunga and Askja - Volcanic Activity

    in Space, Science & nature

    Posted

    Can see what looks like steam on cam 2 but its covered by dust thats been whipped up by the storm.

     

    nothing mentioned on the IMO yet.

     

    Also several EQ's located at around the caldera in the last couple of hours including 2 M3.6

     

    Would be interesting to see exactly what is going on behind that dust but i do not think we will be able to until

    the winds change direction.

    Bárðarbunga and Askja - Volcanic Activity

    in Space, Science & nature

    Posted

    I would think that the overall difference in pressure would be negligible compared to the pressure that's already there.  I suppose it could be the "straw that breaks the camel's back" but I doubt it

     

     

    Thanks.. :good:  thought about it for a couple of days since the low was forecast there, but could not really find anything to prove or disprove what would happen,

     

    thought I'd ask as there are many more knowledgeable people in here than me. 

    Bárðarbunga and Askja - Volcanic Activity

    in Space, Science & nature

    Posted

    This might sound like a silly question.. :cc_confused:

     

    If the magma chamber is no longer full and is emptying in to the dyke, then this would leave an empty space between the mountain and the bottom of the magma chamber, presumably filled with gas and air, so when the low pressures system forecast to hit overnight does would the presumably higher pressure inside the chamber try to adjust to the lesser outer atmospheric presser caused by the low pressure. Similar to our ears popping as we change altitude.

     

    What would the most likely affect be?

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