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Nu is Bįršarbunga weer aan de beurt.

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De waarheid in iemands hoofd is vaak onbuigzamer dan het sterkste staal.
  woensdag 31 augustus 2016 @ 07:37:19 #153
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Situatie is stabiel, vandaag geen nieuwe bevingen, wel wordt het gasniveau van de rivier Mślakvķsl (oostelijk van Myrdalsjokull) continue gemeten.
Hierbij zijn een verhoogde elektrische geleiding en hoge niveaus van zwaveldioxide en zwavelwaterstof vastgesteld.
Het is het raadzaam om niet in de buurt van de rivier te komen, omdat deze gassen giftig zijn.

De aardbevingen op het schiereiland Reykjanes en bij de Bardarbunga worden vooralsnog niet in verband gebracht met de bevingen bij de Katla.

Katla barstte voor het laatst uit in 1918, waarbij immense stukken gletsjer bij de kust terecht kwamen. De kustlijn werd tijdens de eruptie 5 Km naar het zuiden verplaatst.


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banndit78 twitterde op woensdag 31-08-2016 om 09:57:40 #Katla Perhaps more significant than recent quakes, rivers to the south showing increase in levels of sulphur dioxide, hydogen sulfide reageer retweet
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quote:
0s.gif Op woensdag 31 augustus 2016 10:06 schreef Frutsel het volgende:
banndit78 twitterde op woensdag 31-08-2016 om 09:57:40 #Katla Perhaps more significant than recent quakes, rivers to the south showing increase in levels of sulphur dioxide, hydogen sulfide reageer retweet
zou kunnen dat dit de jaarlijkse ontlading van de gletsjermeren is, uiteraard dus vermengd met vulkanische activiteit.

Hoeft nog niet een bewijs te zijn voor een eruptie, thermisch is het namelijk toch wel daar.

Maar wie weet :P

Ik zeg: uitbarsting in oktober (Katla of Hekla, of beide als de een de ander triggert... zijn ze onderdeel van hetzelfde systeem?) :P
Erdogan: “The mosques are our barracks, the domes our helmets, the minarets our bayonets and the faithful our soldiers...”
  zaterdag 3 september 2016 @ 12:56:02 #156
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quote:
0s.gif Op zaterdag 3 september 2016 12:23 schreef ansitermiet het volgende:

[..]

zou kunnen dat dit de jaarlijkse ontlading van de gletsjermeren is, uiteraard dus vermengd met vulkanische activiteit.

Hoeft nog niet een bewijs te zijn voor een eruptie, thermisch is het namelijk toch wel daar.

Maar wie weet :P

Ik zeg: uitbarsting in oktober (Katla of Hekla, of beide als de een de ander triggert... zijn ze onderdeel van hetzelfde systeem?) :P
Katla en Hekla staan volgens mijn niet in verbinding met elkaar. De Katla en Laki wel.
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  zondag 4 september 2016 @ 19:41:54 #157
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Laki is Grimsvotn fissure system. Eldgja is verbonden met Katla. Veiovotn is verbonden met de Bardarbunga. Het is wel mogelijk dat het fissure systeem van die vulkanen onderling verbonden is, maar dat is speculatie. Maar Laki wordt algemeen toegeschreven aan de Grimsvotn. De Eldgja dan weer aan de Katla. En die uitbarsting vond plaats tussen 934 en 940, maar liefst zes jaar aan een stuk maar met een minder hevige intensiteit als die van Laki.
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quote:
Misleading information on Katla
The Iceland Met Office has issued a statement to counteract what they feel are misleading reports on volcanic activity in Katla. Numerous tourists have called the office to ask whether it's safe to fly to Iceland. Many have also called to find out whether their families are safe in Iceland.

As an example, the Crawley News wrote today that a Katla eruption could disrupt flights to and from Gatwick, London citing the effect that the Eyjafjallajökull eruption had in 2010.

The Iceland Met Office has therefore seen reason to issue a summary about the recent increase in earthquake activity in Katla.

"We are aware of inaccurate news in recent days about seismic unrest at Katla volcano, Iceland. To avoid any confusion, we would like to reiterate the current status of Katla."

"Media interest in Iceland's volcanoes has remained high since the Eyjafjallajökull eruption of 2010, hence the summary is intended as an official monitoring statement, in case of diverging media reports."

"Since mid-June, earthquake activity within the caldera of the ice-covered Katla volcano has increased above background levels. More than 100 shallow-seated earthquakes have been detected in Katla caldera since 1 June 2016, which is almost four times the monthly average compared to previous years. Earthquakes occurred mainly in bursts ranging from minutes to hours, often with 20 events or more. The two largest earthquakes since the unrest began occurred on 26 July at 03:42 and 03:50 UTC, respectively, both with a magnitude of Mw3.2.

Such summertime increases in seismicity are common at Katla and the ongoing activity within the caldera is similar to summertime unrest observed in 2012 and 2014. Often this increased seismicity occurred in association with drainage of meltwater from several known ice-cauldrons, formed due to hydrothermal activity, as observed almost annually. Since late June 2016 there have been three small floods in Mślakvķsl river, an outlet from Mżrdalsjökull, in addition to a flood from the Entujökull glacier. Presently, water-level and electrical conductivity measurements at the bridge over Mślakvķsl show increased drainage of geothermal meltwater from Mżrdalsjökull - the ice-cap overlying Katla. We have received several reports throughout the summer of a hydrogen sulphide stench from glacial rivers around Myrdalsjökull.

Around Katla we are not detecting signs of increased ground deformation or bursts of seismic tremor, which are both signals that might indicate movement of magma. We continue to monitor Katla closely and will issue updates on IMO‘s web-site if the situation intensifies. Our assessment is that the volcano is in a period of summertime unrest and it does not show signs of impending eruption, although we cannot rule-out a sudden escalation in seismicity in connection with a hazardous flood."
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  woensdag 7 september 2016 @ 21:59:37 #159
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Weer een aantal bevingen bij de Katla. Waarvan een 3.5 en de laatste nu is een 2.2.
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  maandag 19 september 2016 @ 19:56:59 #160
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Het gaat momenteel flink tekeer in de buurt van Reykjavik.
Veel aardbevingen daar.
http://www.ijsland-enzo.nl/ijsland/actueel_beving.asp
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quote:
Katla teases us once again

Tremors were recorded just south of the volcano Katla yesterday, but it remains decidedly unclear if an eruption is imminent.

Vķsir reports that the tremor measured 3.9 on the Richter scale, making it not an insignificant quake, but also not a definitive sign that Katla will erupt.

“There have been some unusually large tremors, and quite a few of them have been over 3 [on the Richter scale],” geologist Magnśs Tumi Gušmundsson told reporters. “What that means is another story. They are rather shallow tremors, and you would look for more signs of activity, such as expansion and increasing geological heat. If we saw all these things together, than that would be an obvious sign that the volcano is heating up.”

As reported, Katla has been “overdue” for an eruption for some time now. “On average the time between eruptions is 50 years but now the volcano hasn‘t erupted in 98 years,” earthquake hazards coordinator at the Icelandic Met Office Kristķn Jónsdóttir told RŚV. “There will be an eruption, it‘s only a question of when.”

However, the current seismic activity around Katla does not indicate an eruption is imminent, professor of geology Pįll Einarsson told RŚV.

“Katla is a powerful volcano and we should never forget that,” he said. “However, there is nothing in this recent series of events that indicates especially that volcanic activity or an eruption is imminent. People ask, when will Katla erupt? My response is it erupted in 2011. We just didn’t notice it.”

Here, Pįll refers to the glacial flooding which came from four ice cauldrons in the southeastern part of the Katla volcano that year, resulting in no loss of life but the destruction of a bridge over Mślakvķsl.

As such, while technically speaking it is only a matter of time before Katla erupts, the latest recorded activity in the region does not indicate an eruption is imminent at this time. The Grapevine will keep readers updated on any new developments as they arise.
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  vrijdag 30 september 2016 @ 18:14:59 #162
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Vandaag al 71 bevingen...

quote:
Opnieuw heeft er een golf van kleine aardbevingen plaatsgevonden bij de Katla vulkaan.
Gisteren rond de 50 stuks met als zwaarste een beving van 3.0 en vanmorgen alweer 70 stuks, waarvan 7 groter dan 3.5.
De geleidbaarheid van het rivierwater in de buurt is hoger dan gebruikelijk in deze tijd van het jaar, maar niets duidt op een eventuele op handen zijnde uitbarsting.
In het nabije verleden zijn er vaker dit soort verschijnselen geweest.

http://www.ijsland-enzo.n(...)spagina.asp?tabsel=0

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  zaterdag 1 oktober 2016 @ 05:41:12 #163
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Nieuwe swarm. Echter niet al te veel ergs volgens bepaalde vulkaan-amateurs (en wellicht ook wetenschappers, anders was er wel al actie ondernomen).

5xgfz2lfsfcxj.png

Ik citeer:

"1. There is currently no signs of an eruption being imminent.
2. The tremor visible since the 27th is due to an ongoing jökulhlaup.
3. The current earthquake swarm is normal for the season, it occurs at a normal spot, and at a normal depth and they are so far of normal size. Nor is this swarm unusually large.
4. The earthquakes are caused by loss of weight. The weight loss is caused by 1 meter of ice having melted away due to the unusually warm summer. There has also been a series of minor Jökulhlaups from Katla in the last two months. This means that the average loss of ice this year is between 2 and 5 meters for the entire Caldera. The loss of ice is uniform all over the caldera.
5. This swarm contains no earthquakes deeper than 1km with the bulk of them being at 0.1km depth. This is consistent with glacial rebound earthquakes and inconsistent with a volcano closing in on an eruption.
6. All earthquakes in the swarm are of tectonic type with no fluid component.
7. An eruption would look like a very large nuclear bomb going off. Unless you see that it is a cloud, the sun, sheep, a car, a farmer, a helicopter, or a flying sheep. To cut it short, unless you are screaming “Holy Crap” it is not an eruption.

What would we expect IF Katla would erupt in the near future.
An intense earthquake swarm with about 100 earthquakes an hour with depths ranging from 0 to 10km depth with magnitudes up to, but not limited to, M5. There would also be different earthquake signatures indicating movement of magma and harmonic tremor as magma moves up the conduits. We are basically talking about activity that is 100 to 100 000 times more intense than we are seeing now."
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  zaterdag 1 oktober 2016 @ 06:00:49 #164
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IMO (Icelandic Met Office)

"An intense seismic swarm is ongoing since yesterday morning 29 September at Katla volcano. An intense pulse started today at 12:02 (30 September) with several earthquakes around magnitude 3 or larger. No seismic tremor has been detected. Due to the unusually high level of unrest at the Katla volcano we rise the aviation colour code from green to yellow. The volcano continues to be monitored closely."

Burgerlijke Wacht van IJsland:

The National Commissioner of Police and the District Commissioner of Police in South Iceland have declared a Civil Protection Uncertainty phase due to seismic unrest in Katla volcano in Mżrdalsjökull. The contingency plan for an eruption in Mżrdalsjökull has been activated accordingly. Uncertainty phase means that a course of events has started that may lead to natural hazard in the near future. Monitoring, assessment, research and evaluation of the situation is increased.
Increased seismic activity started on September 29 and is still ongoing. Following a meeting with the Scientific Advisory Board of the Icelandic Civil Protection it is likely that the seismic activity is caused by magma movement within the Katla caldera. Three most likely scenarios have been defined.
1 Seismic activity dies out with no further consequences
2. Glacial outburst flood, jökulhlaup, will emerge from the glacier due to a small eruption or emptying of cauldrons
3. Eruption starts in Katla Myrdalsjökull that will force its way through the ice with glacial outburst floods and ash fall
Accordingly a warning has been issued for travellers in the vicinity of Mżrdalsjökull especially around glacial rivers.

______

Toch serieuzer dan ik dacht. De informatie die ik voorhande had, is al verouderd.

[ Bericht 3% gewijzigd door TheRussianBear op 01-10-2016 06:31:28 ]
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  zaterdag 1 oktober 2016 @ 18:06:03 #165
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Activiteit terug op stabiel niveau zo te zien. Alleen is de vraag nu: voor hoelang?
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  zaterdag 1 oktober 2016 @ 21:21:48 #166
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13 stuks vandaag.
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  zaterdag 1 oktober 2016 @ 21:30:00 #167
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maar vergeleken met gisteren en eergisteren is dat erg weinig.
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  zaterdag 1 oktober 2016 @ 21:42:14 #168
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quote:
0s.gif Op zaterdag 1 oktober 2016 21:30 schreef TheRussianBear het volgende:
maar vergeleken met gisteren en eergisteren is dat erg weinig.
scheelt nogal idd.
Twee dagen rond de 70...Ben benieuwd wat er gaat komen.
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  zondag 2 oktober 2016 @ 10:10:51 #169
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Nu toch ook twee bevingen die veel dieper zijn (6.1 en 6.7 km). De laatste zit dan weer op 0.1 km.
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  zondag 2 oktober 2016 @ 10:12:24 #170
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De aardbevingsgolf bij de Katla-vulkaan neemt weer af. De rust keert terug.
Gisteren nog bijna 40, en vandaag tot nu toe nog maar één.....

Op naar de volgende .....

Er wordt wel nieuwe meetapparatuur rondom de vulkaan geplaatst om te kijken of de vulkaanbodem rijst of daalt.


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  zondag 2 oktober 2016 @ 20:44:01 #171
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Currently everything is quiet in Katla volcano. Only two earthquakes happened during the night, the larger one had the magnitude of 2,0 the smaller earthquake had the magnitude of 0,5. There is a good chance that smaller earthquakes have been taking place without being detected due to a bad weather in the area at the moment. Conductivity remains high in Mślakvķsl around 180 µS/cm, it is lower today then yesterday, possibly due to heavy rain in south Iceland.


Quiet period in Katla volcano can last up to a week (in my experience). What exactly happens next is impossible to know, but it is clear that Katla volcano is getting real close to erupting. When that might happen is impossible to know as before. All that can be done is to wait and see.


http://www.jonfr.com/volcano/?p=6430
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  zaterdag 8 oktober 2016 @ 16:16:29 #172
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Eergister 32 bevingen, gister 5...vandaag nog nul. Blijft onrustig bij de Katla.
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  woensdag 9 november 2016 @ 14:40:24 #173
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Mooi verhaaltje over de sneeuw op het holuhraun gebied. (beter gezegd - gemis van sneeuw)
http://earthobservatory.nasa.gov/IOTD/view.php?id=89076
<a href="http://goo.gl/q8fhTe" target="_blank">FAQ?</a>
<a href="http://goo.gl/gYvZFq" target="_blank">Geel is een zonnige en vrolijke kleur, als hij tenminste enigszins warm is gekleurd en wat naar het oranje neigt</a>
  dinsdag 20 december 2016 @ 10:37:55 #174
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Het is nog steeds onrustig bij de Katla.

http://www.ijsland-enzo.nl/ijsland/actueel_beving.asp
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