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Small streams around Hekla volcano dry up

According to Icelandic news there is little water in small streams that come from Hekla volcano. This lack of water in streams from Hekla volcano is often looked as indicators that a eruption is going to happen in coming months. This phenomenon has happened before a eruption took place in Hekla volcano, the last one that took place in the year 2000. But according to old news article (in Icelandic, pdf) (from the year 1995) this phenomenon was also observed before the big eruption in the year 1755. But I do not know if this happens always (it seems to do so. But I don’t have it confirmed) or just before some eruptions.

There has been drought in the area. But that might explain in part this lack of water in streams coming from Hekla volcano. But the rest of this lack of water might be related to changes in the area before Hekla volcano starts erupting. Far as I know there has not been any study into this phenomenon and why this happens to Hekla streams months before eruption takes place.

Hekla volcano does not give many long term signals on when it might start erupting. But far as this one goes, this might be the best signals we can get on the impending eruption in Hekla volcano. When the eruption might take place is impossible to know at current time.

Icelandic News.

Vatn er lítið í ám og lækjum nærri Heklu (Vísir.is, Icelandic)

Low Water Levels Indication of New Iceland Eruption? (English, Iceland Review) – Thanks to Erik at Eruption blog for this link!

Blog post updated at 04:19 UTC. A english news added.

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Large earthquake swarm at Herðubreið

A earthquake swarm that started out small earlier today has grown and is now a earthquake swarm with considerable size. According to automatic data from IMO and the SIL network the largest earthquakes have reached ML2.2 in size.

This area is known for a lot of earthquake activity. So this swarm is not a surprise. But this type of activity happens regularly in this area.

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Geophone network computer update complete

I have finished updating the geophone network computer. Everything is now back to normal and the webicorders should now update normally.

There are minor issues remaining on my geophone network computer. But that is related to lack of hard disk space. That issue is going to be fixed on later date.

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Upgrade to the geophone network computer

I am going to perform a system upgrade to the Geophone network computer tonight. This upgrade is simple. I am moving from Windows 2000 to Windows XP. This update should not take any longer then 2 to 5 hours if I am lucky.

Let’s just hope that there is no big earthquake activity while this upgrade takes place. As everything is going to be off-line while this update takes place.

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A magma related earthquake at Hamarinn volcano

The earthquake that happened this morning at Hamarinn volcano appears to have magma signature in it based on what I see in my own wave data. The size of this earthquake was ML3.5 according to automatic SIL data. The automatic depth of this earthquake is 1.1 km. This data is a subject to a review by Icelandic Met Office.

So far this has been a single event and no aftershocks or other earthquakes have happened in Hamarinn volcano. That might however change. But sometimes large earthquake swarms take place in Hamarinn volcano. But this volcano is known for a lot of earthquake activity at times.

There are no indications of a eruption starting in Hamarinn volcano.

Other earthquake activity

The earthquake at Hamarinn volcano appears to have started a earthquake swarm in Herðurbreiðartögl. But the area must have been at breaking point anyway and the earthquake that happened in Hamarinn volcano might have just acted as a trigger.

There have been earthquake not far from Kolbeinsey island volcano. The strongest earthquake got ML3.3 by the automatic data by the SIL system. But due to the distance this is a underestimate in size of the earthquakes taken place at Kolbeinsey island volcano. I am not sure if the earthquake swarm that was taking place there has stopped or not, as small earthquakes are not detected by the IMO SIL Network.

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Quiet time in earthquakes around and in Iceland

Currently there is a quiet time taking place in Iceland. This sometimes happens. It does not mean that all activity has stopped. But it just means that the most of the earthquakes that are taking place are so called microearthquakes and that they are less then ML3.0 in size. But the thing about microearthquakes is that they are not useless, as this (pdf, English) report from Icelandic Met Office shows.

While it is quiet as it is I am going to relax a little. So that I can take on the busy times better.

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Continued earthquake activity under Blöndulón and in Esjufjöll volcano

It appears that the earthquake activity at Blöndulón and in Esjufjöll volcano has not stopped completely. The earthquake activity at Esjufjöll volcano started on the 20th of October 2010. The first week there where about 70 earthquakes recorded by Icelandic Met Office, the following week there was continued activity but there where fewer earthquakes taking place in Esjufjöll volcano at that time. But the activity had not stopped completely. When this is written there are clues that there is a new earthquake swarm about to start in Esjufjöll volcano. I must point out that so far the earthquake swarms in Esjufjöll volcano have started out slow before they pick up the in size and numbers of earthquakes.

The earthquake activity under Blöndulón lake (man made lake) continues. The earthquake activity is intermittent since it started. But the largest earthquakes that have happened under Blöndulóni lake have reached ML3.8 in size. But the largest earthquakes where felt in nearby farms (up to 80 km away far as I understand). It seems that the earthquake activity continues at this location. But with long stops in-between each earthquake swarm. I do expect the earthquake activity to continue there for coming months. But sometimes it happens that earthquake swarms in the areas outside the main faults take a long time to finish. The longest earthquake swarm that I know of lasted for almost two months. This earthquake swarm at Blöndulón lake might well do something like that. But only time is going to tell us what is going to happen in that area.

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Advertisement is now live on the blog site

As you may have noticed. I have placed two ads from Amazon (as Google Adsense was not working) UK on my web site. I try to have ads as low key as I can have them. I am going to add Google Adsense ads to the blog when it starts working.

Next weekend I am going to add ads to my webicorder web site. I am going to use the same low key approach as I do here. I do hope that the ads don’t bother people. As I know that annoying ads sometimes drive away people from reading blogs and even big web sites. I do want to prevent that from happening to my blog and web site.

Thanks for the support.

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Are Esjufjöll volcano starting to inflate ?

I have been monitoring the GPS station at Grímsfjall volcano. After the earthquakes that took place in Esjufjöll volcano few weeks ago something interesting started to happen at that GPS station. It started to move in north direction.

Due to the location and lack of activity in Esjufjöll volcano there are almost none GPS stations around that volcano, and there are not many SIL station in this area. So getting insight into what is happening in Esjufjöll volcano is hard. But given the GPS station at Grímsfjall volcano it seems to that Esjufjöll volcano have started to inflate. It is hard to know exactly by how much at current time. But it appears to enough to have effect on the GPS station at Grímsfjall volcano.

This is given that Grímsfjall volcano it self is not having any inflation south of the GPS station on it’s own. At the moment it is hard to know what volcano is responsible for the northward movement. Only time is going to tell us the truth in that matter.

Grímsfjall volcano GPS data (automatic, Icelandic)