Showing posts with label Bárðarbunga. Show all posts
Showing posts with label Bárðarbunga. Show all posts

Sunday, August 31, 2014

Global oil supply and Bárðarbunga

Some time ago magma started rising in the rocks near the Bárðarbunga volcano in Iceland, and after weeks of increasingly intensified earthquake activity, the first signs of eruption were found to have occurred under thick ice within the last week. These were not that visible to the general public. That eruption was followed by a second, where there were some streamers of magma across the surface, without causing any significant airborne dust to interfere with aircraft.

The delays in dramatic eruption footage, and the early decay in immediate activity has led a number of folk to anticipate that the risk has declined and for some the risks from the eruption are over, with one scientist commenting::
"If this eruption persists it could become a tourist attraction, as it will be relatively safe to approach, although the area is remote,"

Figure 1. The eruption at Bárðarbunga (from the first webcam) at 5:40 pm Aug 31.


Figure 2. The eruption at Bárðarbunga (from the second webcam) at 9:00 pm Aug 31.


The eruption is continuing and will likely continue, and potentially significantly worsen, over the next several months. Yet, in the world of instant highlights, headlines and Twitter the risks from the long-term eruption (which can be horrendously severe) are immediately glossed over as the eruption fails the “dramatic event” test.

This is uncomfortably similar to the situation that one sees when writing about “Peak Oil”. One can, on any individual day, find comforting headlines that tend to gloss over the longer-term problem that is being written, in increasingly large letters on the predictive wall of our future. But that does not hide the potential disaster that it presages, it merely conceals it from the general public.

The headlines are those that are short-term, and deal with the drivers for the daily fluctuations in oil price, rarely do they back off to look at the overall threat that the situation may presage. Similarly the eruption in Iceland looks relatively tranquil at the moment, but may be of a similar nature to that of 1783, which created, over a period of months, an absolute disaster in Europe, and may have been one of the contributing causes to the French Revolution. The problem with the oil crisis is that there is no similar history to look back on. (Not that this would matter to those “editors of the moment” who control the daily press).

If one were to step back from concerns over daily price fluctuations for oil and gasoline, and consider the import of the trend in international politics one could very easily be aghast at the situation. Not that one might tell this from the headlines.

Consider that, of the three international leaders in oil production, one – Russia – is currently set on a course that may well lead the rest of us into World War 3. As a consequence is likely to be unable to attract the financing that will allow it to even approach the current levels of oil production that it need to retain current production levels in the years to come.

The second of the three is Saudi Arabia. Glossing over any problems that the Kingdom may run into in the next couple of years with the terrorism that is sweeping though its neighbors, it is a country that has realized that today’s cornucopia is about over, and it must seriously invest in exploration and development. The KSA recognizes that if it is to have a chance at being able to even meet the bills for domestic consumption, let alone export income, as the years move onward, it must find new oil. Again it would seem that global commentators fail to realize that, while KSA is recognizing the problem, any finds of “elephantine fields” would require huge investments of money and time, given that they are now likely to be off-shore and sour (as with Safaniya and Manifa, even if such fields exist, which is very doubtful).

The Kingdom has repeatedly stated that it will not increase its production over current levels, despite the assumption of many commentators that they will have to, if global balance is to be retained between supply and demand. Put bluntly, their analysts have realized that, without new reserves that are currently still to be found, they will be unlikely to be able to meet even current targets without major new field finds. Yes, they have fields that are found and available, but in relative terms they are tiny when set against the current levels of production. (Bearing in mind that a 5% reduction in production per year from existing fields, a level now increasingly found to be overly optimistic, would still cut existing production by 450 kbd).

And so, gentle readers, as we have so often in the past, we return to prognostications of future American production. This should, realistically, be focused on the production from the USA, since that in Canada is tied to production from the oil sands and that is only likely to change at a slow (one might suggest geological, but that would be a little harsh) time frame.

And in the United States hope continues to focus on an assumed linear increase in production, month on month, from the Bakken and Eagle Ford Shales. That this is denied by even the local authorities (who also note that the Bakken is named after a local farming family). Their current estimate (assuming more than 200 drilling rigs, and there are currently only 192 is that the fields will peak in 2017, and will start to decline in around 2026. The problem with that estimate relates both to the number of rigs employed (which have to be higher) and the quality of the remaining reserve (which is highly unlikely to be of equivalent value to that which is now, or has been, developed in the past.

I would venture into the second tier producers, but they include those that lie in the MENA (such as Iraq and Libya) and are in even worse condition than KSA, and yet, as documented here repeatedly, these states seem increasingly unlikely to meet projections and thus are an ongoing and significant threat to a balance between global production and demand.

The global economy, and particularly the economies of the Western countries, are tied to a cheap source of energy and power – on which their industrial clout is based. Remove that underpinning, and the writing is clear on the wall about this, and current levels cannot be sustained.

But, as with the wish of the press to get “beyond” the “yesterday’s story" of Bárðarbunga, so the reality of the energy situation is unlikely to be recognized until, as with the Iceland volcano. its effects become too evident to ignore.

Read more!

Thursday, August 28, 2014

Iceland volcanic eruption may be under the ice

The BBC are reporting that small "cauldrons" have appeared on the glacier over the growing dyke of rock that is penetrating upwards in the Bárðarbunga region of Iceland. This suggests that the magma has reached the bottom of the ice, and causing it to melt, with the overlying cap then collapsing into the cavity. Jón Frímann notes that the water in Grímsvötn Lake has risen about 15 m, so that presumably is where it is flowing at the moment. That rise is equivalent to the melting of around 45 million cubic meters.


Figure 1. Location of the "cauldrons". Note also the progression north of the quakes over time, as the dyke extended. (Ice News)

The migration has also reached the Askja volcano, which might be a second path for the magma to reach the surface.

Erik Klemetti has written about the different scenarios that might happen should the magma reach that point, with there being some risk of an Eyjafjallajökull type eruption as one of five possible scenarios for the region.

As with the previous post on this activity, I will update below the fold for future developments.

UPDATE: 29th August.(There is a second under the fold(.
An eruption has begun in the northern end of the dyke. Because it is neither in the Askja caldera, nor under the ice, there is little ash cloud at the moment. According to the Ice News report:
Shortly after midnight a fissure eruption started between Dyngjujokull glacier and the Askja caldera in the Northern region of lava field Holuhraun. It is a fissure eruption on what appears to be a 300 metres long rift with a NA-SE direction. No volcanic ash has been detected with the radar system at the moment. The wind field conditions in the area are wind blowing toward NW at 12 m/s at 5 km altitude. Seismic eruption tremor is low indicating effusive eruption without significant explosive activity.
UPDATE #3: Here is a picture showing the outflow of magma, from Reuters via The Daily Mail.


Figure 1a, Magma flow out along the fissure.

2nd update on 29th August.
Watching the eruption on the on-site cameras, the Bárðarbunga 2 camera appears to be continuously shaken by earthquakes at 10:52 am Eastern, and the map of the quakes shows strong activity back at the Bárðarbunga caldera. It really depends on where the initial magma entry is into the dyke, which is most likely to be back at the south end of the dyke. This would increase the risk of at least some of the magma breaking through the ice cap and projecting an ice cloud.


Figure 2. Earthquake pattern on the morning of the 29th. (Icelandic Met Office via Wattsupwiththat).

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Saturday, August 23, 2014

A small eruption, so far (but the threat is getting bigger)

Jón Frímann is reporting that the eruption has started, but as yet is small. There are some web cameras and in the comments on his post there is some discussion of what they show, with the picture below showing what appears to be the start of a fissure eruption. This is consistent with an intrusion of the magma in the form of a dyke which is traceable from the earthquake patterns.


Figure 1. Webcam view of the start of the Bárðarbunga volcanic eruption.

The activity seems to be occurring in several places, with that part that is under the ice not being visible, were it be occurring, though if it breaks through the ice then this is where the larger plumes might be generated.

Figure 2.Earthquakes around the site (Icelandic Met Office)

The condition has been changed to RED, with the Met Office reporting that there are 150 to 400 m of ice above the surface in the region of maximum activity, and it will take some time for the magma to burn through this to the point where it ruptures, if it is big enough to do so. However the latest earthquakes include one of over 4.5 which is quite a bit bigger than earlier ones.

This has been UPDATED on 24 August

And on August 25th.

And on August 27th, as the quakes continue and approach the surface

.

The activity is continuing to grow.


Figure 3. Later on the 23rd. (Icelandic Met Office via Jón Frímann)

The eruption is definitely occurring along a rift in the rock. The development can be seen from a picture of the developing earthquakes from the 16th August, as Jón Frímann shows.


Figure 4. Development of the eruption as the magma moves along a rift to form a new dyke which is rising to the surface, prior to the eruption on the 16th August (Icelandic Met Office via Jón Frímann)

The growing size of the potential eruption can be seen from the latest picture of the earthquake activity, with it spreading away from the caldera.


Figure 5. Overview of Iceland showing the increasing scope of the activity on 24 Aug. (Icelandic Met Office)

The dyke is reported to be 40 km long already, and the magma, outside the ice cap may likely flow without much of it generating the high clouds of ash that are a threat to aircraft, and future weather patterns in Europe. (These eruptions can last some time). However if the bit under the icecap breaks through then the combination of water turning to steam and thermal shock on the rock can generate the very small particles which become a threat to both.

25th August Most of the activity is still occurring about 5 km below the surface, and the question becomes where, if anywhere, will the eruption reach the surface.


Figure 6. Earthquake activity 25th August 2014 (Icelandic Met Office).

The latest quake above magnitude 3.0 is at the northern end of the activity, suggesting that perhaps the magma is flowing in that direction, so that if it were to migrate to the surface then it would not come out under the ice cap. Which would be good news from the viewpoint that it is less likely that this will generate the high clouds of micro particles that might have occurred, as they did with the Eyjafyallajokul eruption in 2010.



There is, however, another concern that comes from the basaltic flows of lava, and was at its likely worst in 1783 when the nearby rift at Laki opened. The gases produced are toxic and were of sufficient volume that a large portion of the livestock and crops died, leading to the death of a quarter of the population from famine. The impact on Europe was also severe, with some suggesting it as a partial cause of the French Revolution. In part this was because of the resulting haze (which spread globally)which dropped temperatures around the world.

It also lasted eight months.

August 27th - The activity continues with quakes above 3.0 along the dyke, and with the earthquakes seeming to be approaching the surface.


Figure 7. Earthquke activity 27th August 2014 (Icelandic Met Office)

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Sunday, August 17, 2014

Iceland may soon have a new volcano

Most of my focus as I watch the earthquake patterns in Iceland has been on the Mýrdalsjökull glacier, but it appears that the number of quakes up at Bárðarbunga has reached the point of concern.


Earthquake pattern in Iceland on Aug 17, 2014 (Iceland Met Office)

A closer look at the site seems to show that the activity is due to magma movement, and there is an ongoing ground swelling which supports this.


Closer look at the eruption pattern (Iceland Met Office)

Jón Frímann has been watching the site and has a more detailed description of what the instruments are showing. Note that the activity is under the ice cap, so if it breaks through this may well contribute to the size of the particles generated, and the resulting size and path of the debris cloud.

I will update below the fold if this situation gets worse.
UPDATED Aug 18th, twice since the Icelandic Met Office have now raised the warning to orange. (h/t Jón Frímann)

One day later and, depending on your point of view, the quakes are getting more focussed, or the activity is beginning to settle down. The stars denote quakes that are larger than 3.0, though these two barely make that distinction, and there is one around each of the foci of activity.


Figure 3. Earthquake activity August 18, 2014 (Iceland Met Office)

UPDATE 2 at 4:30 pm

As noted above the fold, the Icelandic Met Office has noted the increasing levels of activity and has upped the warning for the region to orange, which means:
ORANGE: Volcano shows heightened or escalating unrest with increased potential of eruption.
This is only superseded by RED, which occurs when either the eruption is imminent or already happening.

Read more!