Iceland’s Eyjafjallajokull last status shows a decline in the ash cloud. The ground continues to rumble and earthquake activity is increasing under the bigger volcano, Katla.
The earthquakes at the Katla volcano site appear to possibly be increasing in frequency as of this moment (time will tell however). Since May 17 there have been four earthquakes at or very near Katla, while a 5th just on the edge of the Myrdalsjokull glacier.
Although 4 or 5 earthquakes at the volcano site in 4 days does not indicate a drastic change in pattern, the interesting notation at the moment is the fact that the two most recent earthquakes occurred within 3 hours of each other on 21 May, 2010, at depths of 5km and 13km. That in itself is an increase in occurrence. It may be an anomaly, but it justifies keeping one eye on Katla, the big sister of Eyjafjallajokull.
There is some correlation between earthquakes and the prediction of an eruption, but they are unreliable. Wouldn’t it be nice to know how to predict when a volcano will stop erupting? In Hawaii, the world’s longest erupting volcano, Kilauea began erupting 10,000 days ago yesterday. It began erupting January 23, 1983 and has no end in sight. Blogger Leigh Hilbert lives near the volcano and has daily updates and fabulous photos- http://hawaiianlavadaily.blogspot.com/2010/05/hawaii-volcanoes-national-park.html. I wish we could send him to Iceland for awhile to make the comparisons between the two and to provide better photos than we are getting from the press there. Are there no professional photographers in Iceland?
Link to Iceland Meteorologic office website earthquake data : http://en.vedur.is/earthquakes-and-volcanism/earthquakes/myrdalsjokull/
Tremor measurements can be found at http://hraun.vedur.is/ja/Katla2009/gosplott.html
Webcams at: link to sv.tinypic.com] [link to eldgos.mila.is] [link to www.ruv.is] [link to www.vodafone.is] [link to www.mulakot.net] [link to www.sat24.com]
Hat tip http://modernsurvivalblog.com/natural-disasters/katla-volcano-update-21-may-2010/
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It’s amazing that earthquakes don’t cause more eruptions. I can see that there might be some relationship, but I mean for an area like Iceland where volcanos and earthquakes are more frequent, you would think that there would be a more obvious relationship between the two.