Posted on by Jón Frímann

Harmonic tremor event in Hamarinn volcano

Tonight there was an small harmonic tremor event in Hamarinn volcano (Loki-Fögrufjöll, Bárðarbunga). This event was not big. But did appear on the Skrokkalda SIL station and on Grímsfjall SIL station. The pattern that is now appearing is the same one that did appear in July 2011 in the minor eruption in Hamarinn volcano. But that event took place week after Katla volcano minor eruption.


The harmonic tremor pulse on Skrokkalda SIL station. This is most likey from Hamarinn volcano. Copyright of this picture belongs to Iceland Meteorological Office.


The harmonic tremor pulse on Grímsfjall SIL station. This is most likey from Hamarinn volcano. Copyright of this picture belongs to Iceland Meteorological Office.

What gives clues that this Hamarinn volcano is that few days ago it had minor earthquake activity. But this area does not seem to need a lot of earthquake activity before a minor eruption takes place. Why that is I have no idea at present time.

I am going to update this blog post as event progress.

11 Replies to “Harmonic tremor event in Hamarinn volcano”

  2. Two EQ’s at Jan Mayen, look at the depths

    2012-04-06 03:15:57.4 71.07 N 7.86 W Depth 94km ML
    2.9 JAN MAYEN ISLAND REGION 2012-04-10 11:04

    2012-04-05 21:29:00.0 70.89 N 6.47 W Depth 1km ML
    3.2 JAN MAYEN ISLAND REGION 2012-04-10 09:22

    1. The first depth is wrong. It happens. The second depth might be correct. Hard to know for sure. But this are not large earthquakes for this area.

    1. Look at the date of the graphs: latest data-point October 2011. This has nothing to say about the current situation.

      1. I think you’re right. But I saw the year 2012 on the scale and didn’t noticed the right point. But this graph is for some years not for one “dramatic” moment. 2011 it’s going up and the question is, what happend this year.

  5. I am sorry for lack of posts. But I am planning my move back to Denmark and I am using my laptop. That is having a hard disk that is failing. So I am unsure how much work I can actually do on it.

    So if anyone knows about good place where I can buy a hard drive in Denmark cheap for my laptop, or where it is best for me to buy a used laptop for spare parts. Links are welcomed here for that.

    Thanks! 🙂

  6. Jon, check out the drumplot for GRF. This morning about 0830. What do you make of that?

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