According to Rúv it appears that British Geological Survey did pay for the set-up of six seismometers around Eyjafjallajökull and Katla volcanoes. This seismometers are able to detect lower frequencies better then current seismometers around Eyjafjallajökull and Katla. This type of sensors are normally called broadband seismometers and have frequency range down to 0.001Hz and up to 60Hz. I do not know how far the sensors that BSG did cost. But I am going to assume that they go down a bit farther then IMO sensors in the area. According to Rúv the sensors are already up and where on-line earlier this year.
They are located at following location.
Mælifellssandi not far from Slysaöldu, Rjúpnafell east of Mýrdalsjökul, two are located both sides of Eyjafjallajökull on Ásólfsskálaheiði at south and Smjörgili at north not far from Gígjökli glacier. Fifth sensor is going to be set-up in Pétursey in Mýrdal. The location of the six sensors has not been decided yet.
The cost of this project is about 100.000 pound according to Rúv.
The reason for this is that authorities in UK (and Europe) want to get more warning if there is a big eruption in Katla volcano. Mostly to prevent the air chaos that took place when Eyjafjallajökull erupted earlier this year.
Five sensors where in the area before. The sensor net is going to be really sensitive when the new sensors go on-line at IMO headquarters in Reykjavík. But more sensors give more accurate location of earthquakes, both in depth and location.
The news from Rúv in Icelandic. Use Google Translate at own risk.
Due to how busy I am in school at the moment I don’t have a lot of time to write a long stuff. But while that is I am going to put in some videos of the Eyjafjallajökull eruption 2010. But that eruption has provided material for many years.
There is a sudden and sharp rise in harmonic tremors around Katla and Eyjafjallajökull volcano. I currently do not know what volcano is responsible for the spike in harmonic tremor. But this does not look like is a noise from the weather. But that can happen often this time of the year, as the wind forecast is good for all of Iceland at current time.
I will post more information if and when I get them.
SIL stations where the harmonic tremor rise can be seen.
The news tonight at Stöð 2 (Channel 2) in Iceland reports that there is a new ash trail visible from the top crater in Eyjafjallajökull. It can be seen because of the new snow layer on top of Eyjafjallajökull that did fall few days ago.
Geologists find this interesting. But they are unclear on why this happens. But they doubt this is due to explosions happening in the crater. The ash is either carried by steam or by wind over the crater rim and falls into the new snow on top of Eyjafjallajökull.
The news can be viewed here (in Icelandic, Windows Media Player required to view this video).
Over the past weeks there have been deep earthquakes happening under Eyjafjallajökull. The deepest earthquake so far that has happened was on 21 km depth. The latest earthquake that happened was on close to 15 km depth. Currently it is impossible to know if there is new magma pushing up.
If it is, then the amount of magma that is rising up trough Eyjafjallajökull is not great and is unlikely to start a new eruption any time soon. It is however worth noticing that this might change with a short notice. But the eruption in March to May 2010 did show that magma can rise fast up trough Eyjafjallajökull and appears to be followed by earthquake activity.
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