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About Hekla tremor [link to hraun.vedur.is
"Carl le Strange says:
February 20, 2012 at 10:18
There is no tremor at Mjoaskard.
I wrote a short note on it yesterday in the comments.
Those are microceisms that happen between 2 and 10 minutes apart. And because of every stapel on the plot (1 pixel wide) is 28m 48s in time, you get several microseisms in one stapel (stäbchen). That makes it look like tremor, but it is not. The actual tremor level on the plot is quite low really.
These microseisms are a bit odd. I do not know if they are icequakes or popcorn. That is impossible to tell since I do not have depth.
SNB also is having microceisms (most likely frost quakes), not harmonic tremoring.
And for those wondering, yes, I do see the microceisms one at a time."
Hmm. Means, it not a tremor - but that this such ideas aren't present.
Let's look that further with it will be.