Yesterday (01-May-2015) a minor dyke intrusion took place in Katla volcano. This dyke had depth down to 26,9 km and up to 18,5 km. This is the second dyke intrusion in this are in short space of time. Largest earthquake in the following earthquake swarm had the magnitude of 2,0.
Dyke intrusion in Katla volcano (dense cluster of earthquakes). Copyright of this image belongs to Icelandic Met Office.
While this doesn’t signal imminent eruption in Katla volcano this activity does have me concerned due to past experience with activity in Katla volcano. This might die out, but there is no way to know for sure. All that can be done is to wait and see what happens next in Katla volcano.
Notice on Grímsfjall volcano
There has been a slight increase in earthquakes in Grímsfjall volcano. This suggest that the volcano is about to be ready for its next eruption. Earlier eruptions took place 2011, 2004, 1998 … etc. It is impossible to know when or how big next eruption in Grímsfjall volcano is going to be.
Similar burst of quakes in Bardar too – 26 in 20 mins between 20 and 10k deep.
Thx Chris! Saw that on a plot, but IMO didn’t update their quakes until this morning. So I was not sure, if it’s real or a few heavy sheep were stamping around. But now, it is on IMO and can be seen here, too: http://hraun.vedur.is/ja/arg/png/bardarbunga_15d.png
‘a few heavy sheep’! Lol.
I’m never going to Iceland if the sheep are that big! 🙂
This one http://tinyurl.com/krq7o24 was spotted in UK. Can’t tell for Iceland!
Floating last 15 days…
On Katla (Myrdalsjökull in general): http://hraun.vedur.is/ja/Katla/myr_allt.html
On Grimsvötn: http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_15d.html
I give Grimsvötn some 700 to 800 days to go. 😉 Statistically…
You could be right…statistically:
http://hraun.vedur.is/ja/vatnajokulsvoktun/grf_uppsafn.html
I agree with the stats and the hundreds of days we have still have. I don’t know who is Jon’s Source but IMO will certainly know.
Is it me or when you review the whole country activity map, it appears the entire country is becoming seismically active or is that just a normal overlay pattern?.
It is all active, even the areas that aren’t covered by instrumentation. We have to remember that tremor is still high, and another event will happen. It may occur with no, or little warning.
250 million years ago this planet was virtually uninhabitable due to volcanic activity and plate shift. The rest of the countries in the northern hemisphere would do well to remember that and assist Iceland in supplying state of the art seismology equipment so that even the most remote areas can be monitored.
I would add subsea equipment to that tally as the mar needs to be covered as well, there’s a great deal goes on down there that we don’t know about.
Jon,
What are your thoughts on the seamount volcano (likely) erupting along the edge of the Juan de Fuca fault in the Pacific? It’s off the Oregon coast. Apparently this happened in advance of the 2011 Japan quake.
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Over the last 4-5 days, there’s been a slight but clearly visible, and very steady, increase in 2-4 Hz tremors at the Grimsfjall station. I don’t know if it is of any interest to anybody else, but it caught my attention.
http://i.imgur.com/EcEbkVg.gif
I have noticed this too. I don’t know why this is happening. Grímsfjall might be up to something or this might be just increased hydrothermal activity. Impossible to know for sure.
The same thing happened at the HUS station, but reduced instantly at the same moment as the M3.2 occured at Hamarinn.
Tremor pulse at Grimsvotn just now, with a clear initial break. Seems localized.
http://shrani.si/f/2u/qN/1VrEo9MN/grf2.png