Earthquakes – Page 91 – Iceland geology

December 26, 2015December 27, 2015

Fresh earthquake activity in Bárðarbunga volcano

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Last night (26-December-2015) two magnitude 3,3 earthquakes took place in Bárðarbunga volcano. This earthquake activity was followed by a change in activity on 2 – 4Hz band, I’m not sure why that is, it might signal a inflow of magma at depth into shallow parts of the crust. This is however only guess on my part, this change in signal and it’s origin.

The change in the SIL station can be seen between 25 and 26-December-2015 on the blue line. Copyright of this image belongs to Iceland Met Office.

It is my view that the risk of eruption in Bárðarbunga volcano is increasing fast and Bárðarbunga volcano might erupt without warning at any time. Iceland Met Office holds a different view and that is there is no major risk of eruption in Bárðarbunga volcano at the moment, even if magma continues to flow into Bárðarbunga volcano.

The earthquake activity in Bárðarbunga volcano. Copyright of this image belongs to Iceland Met Office.

The magnitude 3,3 earthquake in north-east part of Bárðarbunga volcano caldera had the depth of 0,1 km. The magnitude 3,3 earthquake in south-east part of the caldera had the depth of 2,5 km. At 08:20 UTC this morning a magnitude 1,0 took place in Bárðarbunga volcano, that earthquake had the dept of 20,3 km and that suggest the magma inflow might be more than current ideas and models suggest (this earthquake is on the edge of the volcano, not far from Tungnafellsjökull volcano). I don’t know what is going to happen next in Bárðarbunga volcano. Since nobody knows for sure what is going to happen next in Bárðarbunga volcano.

Update 1

The earthquake activity in Bárðarbunga volcano has now created a half-circle of earthquakes in the caldera. Over the past 24 hours there has been slight increase in activity in Bárðarbunga volcano after the magnitude 3,3 earthquakes. There has also been some odd harmonic tremor spikes around Bárðarbunga volcano, the problem is that at the moment there is bad weather taking place at this location in Vatnajökull glacier area. So this might just be wind. I have to wait until the weather gets better in order to see if anything changes.

The earthquake activity in Bárðarbunga volcano at 27-December-2015. Copyright of this image belongs to Iceland Met Office.

I don’t know if any more activity is going to take place. This might die down, it is difficult to be sure about what happens next.

Article updated on 27-December-2015 at 17:56 UTC.

December 20, 2015December 20, 2015

Earthquake activity in Bárðarbunga volcano

Last night (20-December-2015) a earthquake activity took place in Bárðarbunga volcano. Largest earthquake in this short earthquake swarm had the magnitude of 3,5 and the second largest earthquake had the magnitude of 3,1. This earthquake activity is shallow and above above 10 km depth and it appears to be result of magma activity in north-eastern part of Bárðarbunga volcano caldera. The earthquakes that took place appear to be long period volcano earthquakes (details can be found here, under b-type earthquake).

Earthquake activity in Bárðarbunga volcano. Copyright of this image belongs to Iceland Met Office.

There clearly is something going on in Bárðarbunga volcano, it is already known that inflation is taking place in Bárðarbunga volcano after the eruption in Holuhraun ended in February-2015. Along with increase in dyke intrusions this clearly suggest that magma pressure is increasing inside Bárðarbunga volcano. What worries me is not the risk of large eruption in Bárðarbunga volcano. The risk in my view is at the moment risk of small eruption taking place, if a small eruption takes place under a glacier it is going to mean glacier flood. Size depends on the eruption size, duration and other factors. Currently there are no signs of imminent eruption, but that might change without warning. The north-eastern part of the Bárðarbunga volcano caldera is in my view weakened structure due to all the earthquake activity for the past 15 (about) months.

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December 16, 2015

Minor dyke intrusion in Bárðarbunga volcano

From 20:10 to 20:14 UTC a minor dyke intrusion took place in Bárðarbunga volcano. This dyke intrusion was small, only lasting those few moments and the largest earthquake had the magnitude of 2,5. Other earthquakes are smaller. Depth was from 15,6 km to 23,2 km. Based on the location, this is clearly a dyke intrusion into Bárðarbunga volcano. It is too small to start an eruption, but suggest that magma processes in Bárðarbunga volcano are starting to increase again.

The dyke intrusion in Bárðarbunga volcano. Copyright of this image belongs to Iceland Met Office.

There is also a change in the SIL station Vonarskarð. What is creating remains unknown. This might be a change in hydrothermal systems under the glacier, but is impossible to know for sure at this point in time. Copyright of this image belongs to Iceland Met Office.

I don’t know if any more earthquake activity is going to take place in Bárðarbunga volcano. Since it is impossible to know what magma does next inside a volcano. At the moment I’m not expecting a eruption in Bárðarbunga volcano.

December 14, 2015December 14, 2015

Update on Prestahnúkur earthquake swarm

The earthquake swarm in Prestahnúkur volcano is ongoing with breaks. The fault that is moving is around 5 to 15 km long at the moment (based on the map). The largest earthquake so far has had the magnitude 3,5 and was felt in nearby towns and farms, the second largest earthquake had the magnitude 3,0. Other earthquakes have been smaller so far.

The earthquake activity today (14-December-2015). Copyright of this image belongs to Iceland Met Office.

I expect this earthquake activity to continue in the next few days to weeks.

The earthquake activity in this area since 1991 (grey circles). New activity are the red circles. Copyright of this image belongs to Iceland Met Office.

The image above is from Week 50 earthquake information website. It can be found here.

Other matters

I’ve been a bit down in the past few days, since I’m living in Iceland and I don’t like it. I don’t belong in Iceland, not sure why that is, it just is. I don’t like the culture (Icelanders are copying U.S culture to some degree, not everything, but many aspects of it), I don’t like the snow and the cold weather. I also don’t like the isolations that follows living in Iceland.

Moving to Denmark

If anyone wants to support my move back to Denmark that can be done with the PayPal button or directly, information about how to do so can be found here.

At the moment I’ve collected money for almost everything. The transfer cost and the first month in rent for the apartment. What is missing is the money for the insurance for the apartment, but I can get a good rent loan for that in Denmark. The insurance amount I have to pay is 9000 DKK (1,206.13€). All that I’m currently waiting for is the Danish Tax (Skat), I’ve been having problem with them for the past few months and that issue has not been resolved yet and that issue is keeping me in Iceland at the moment. Regardless of that, I’ve started preparing my move back to Denmark so that I can move quickly once my last problem has been resolved.

Advertisements and donations

Donations keep this website going. Since it has already outgrown smaller and cheaper hosting options for me. I have to pay $135 in hosting cost a month and so far I’m running at loss. When it comes to advertisements I’m not going to be returning to Google Adsense since getting into that is close to impossible at the moment due to TOS and other changes Google (now Alphabet) has done over the years. Leaving small websites like mine high and dry when it comes to income. I’m going to continue to use Amazon. I hope that no major changes in their TOS and such agreements forces me to quit using them. The rules are getting narrower by the year and aligned in such a way that they fit high traffic website better. Rather then small traffic websites like I currently have.

Thanks all for understanding.

December 11, 2015December 11, 2015

Earthquake swarm south-west of Langjökull volcano (Prestahnúkur)

Yesterday (10-December-2015) a earthquake swarm started in south-west Langjökull (Prestahnúkur volcano [Wikipedia page here]). Currently the earthquake swarm is ongoing. This is a slow earthquake swarm so far, not creating many earthquake over period of one hour. Largest earthquake so far had the magnitude of 3,2. Other earthquakes have been smaller, but many earthquakes are over 2,5 in magnitude. The largest earthquake was felt in nearby town of Hvanneyri and possibly other farms close to the location where the earthquake swarm is taking place.

The earthquake swarm in south Langjökull volcano (Prestahnúkur). The earthquake swarm is located in one spot. Copyright of this image belongs to Iceland Met Office.

This earthquake activity is appearing on my geophones when it comes to earthquakes over magnitude 1,9. Every 10 to 20 years this area has earthquake swarms that creates earthquakes with magnitude 4,0 and above. Last such earthquake swarm was something over 10 years ago if my memory is correct. At the moment there is nothing suggesting that eruption might happen at this volcano any time soon. Last eruption took place 3500BCE (GVP information).

December 10, 2015

Minor earthquake swarm in Krafla volcano

On 7-December-2015 a minor earthquake swarm took place in Krafla volcano. The strongest earthquake in this swarm had the magnitude of 3,2. I don’t know if it was felt in nearby town. It was followed by few minor earthquakes, both before and after.

The earthquake swarm in Krafla volcano. Copyright of this image belongs to Iceland Met Office.

I don’t expect any more earthquake activity in Krafla volcano. At least not outside normal background activity.

December 3, 2015

Earthquake swarm in Torfajökull volcano

Today (03-December-2015) a small earthquake swarm took place in Torfajökull volcano. This was a small earthquake swarm and none of the earthquakes did go above magnitude 2,0. Depth suggests that origins of this earthquake swarm can be traced to hydrothermal changes taking place in the volcano.

The earthquake activity in Torfajökull volcano. Copyright of this image belongs to Iceland Met Office.

This type of earthquake activity happens in Torfajökull volcano since magma is at shallow depth in a wide area inside the caldera. Nothing else is expected to happen.

November 28, 2015November 28, 2015

Deep earthquakes in Katla volcano – renewed activity

Yesterday (27-November-2015) new earthquake activity took place in Katla volcano. This activity, in part of the Katla volcano caldera is a repeated pattern, this means that this has happened before. Last activity of this type took place in September (from what I remember). This activity suggests that a magma is building up at the east part of the caldera at the depth of 20 – 28 km (in my view). Currently there is no risk of eruption.

Earthquake activity in Katla volcano on 27-November-2015. Copyright of this image belongs to Iceland Met Office.

It is difficult to know if there is going to be more activity in Katla volcano. It might happen and it might not. All that can be done is to wait and see.

Changes in Amazon advertisements

Due to agreement changes regarding Amazon advertisement (or associates it’s called in some markets) I have to close down my accounts for Italy and Spain right now. That is due to the fact that I don’t have any income from those accounts. I’ve had little income (one sale) on Amazon France, but if it’s usage does not increase soon I’m also going to close it down soon. The reason for this is that Amazon now takes a “maintenance fee” from accounts that don’t have any income. This is new and I’m not going to support Amazon in this way if I can avoid it. So any Amazon account for advertisements that doesn’t provide income for a long period of time is going to get closed down (this are periods of at least 12 months).

Donations

Please remember to support my work with donations or by using Amazon advertisements to buy stuff. Thanks for the support.

The move back to Denmark

I’m going to move back to Denmark in March of 2016 (maybe earlier) if everything has been shorted out. I’m not sure if that is going to happen, currently I’m dealing with a large issue with the Danish Tax and I can’t move to Denmark until that has been resolved.

Article updated at 02:18 UTC.

November 19, 2015

Inflation confirmed at Bárðarbunga volcano

Iceland Met Office confirmed today that inflation has started in Bárðarbunga volcano. According to images released by Iceland Met Office this inflation is not huge at the moment, that might change without warning if magma starts flowing into Bárðarbunga volcano magma chamber at faster rate then it currently is doing.

Inflation as recorded by Iceland Met Office. This recording has been corrected for normal tectonic drift, glacier movements and dyke intrusion from Holuhraun eruption. Copyright of this image belongs to Iceland Met Office.

The inflation as it appears on GPS station on Bárðarbunga volcano. It has been corrected in the same was image above. Arrow show much the inflation is on each GPS station and the direction it is moving. Copyright of this image belongs to Iceland Met Office.

The problem here is that Bárðarbunga volcano continues to settle into new form after the eruption in Holuhraun, since there was a quiet magma chamber collapse during that eruption. The question remains how much strain the caldera can now take after the collapse and other unknown factor is that it is not known how much magma is needed before an new eruption can start or how long time this process takes. For the moment the only thing that can be done is to continue monitor what is going on in Bárðarbunga volcano.

November 18, 2015

Earthquake swarm on the Reykjanes peninsula (Fagradalsfjall mountain)

Yesterday (17-November-2015) and today (18-November-2015) an earthquake swarm started on the Reykjanes peninsula, this earthquake swarm took place in Fagradalsfjall mountain. Total of 80 – 90 earthquakes took place, none of them larger than magnitude 2,1.

The earthquake swarm on the Reykjanes peninsula. Copyright of this image belongs to Iceland Met Office.

This earthquake swarm looks like a fault swarm, rather than anything connected to a volcano. Earthquake activity might continue in this area for next few days, with a risk of earthquakes with magnitude above 3,0 happening.

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