Hi,

There is a diffrence between a harmonic tremor and volcanic tremor.

Here is a good explanation.
http://en.wikipedia.org/wiki/Harmonic_tremor

This earthquake here happened yesterday (12th March 2010), and possible
is a volcanic earthquake.

http://seismicnet.com/cgi-dos/makegif.exe?/quakes/1003/100312.144744.hkbn.p=
sn

Regards,
J=F3n Fr=EDmann.

On fim, 2010-03-11 at 15:46 -0700, Geoffrey wrote:
> When you say Volcanic Tremor
> by that do you mean Harmonic Tremor ??
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> ----- Original Message -----=20
> From: "J=F3n Fr=EDmann" 
> To: 
> Sent: Wednesday, March 10, 2010 8:57 PM
> Subject: Re: More then 2000 files
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> Hi Jerry,
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> Tectonic and high frequancy earthquakes in volcanoes are not that
> diffrent. But a volcanic tremor is a low frequancy events with a long
> tail. I have only recored once such event and that was in a volcano
> named Gr=EDmsjall, that was few weeks ago. That is how I can tell the
> signals apart.
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> But I also use IMO data, and the location is usally a good clue on what
> type of activity this is. But that might not always be the case.
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> The swarm continues, and the Hekla station plot is quite intresting. As
> it is full with earthquakes.
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> Regards,
> J=F3n Fr=EDmann.
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> On mi=F0, 2010-03-10 at 21:46 -0600, GPayton wrote:
> > Jon,
> >
> > You live on the North Atlantic Ridge splitting Iceland.
> >
> > How do separate its normal magma activity from that of a nearby
> > volcano's magma activity, if there is a difference?  To me, it would
> > be like living next to a subway tunnel and trying to hear people
> > walking above on ground level?  Just wondering how you do it?
> >
> > Regards,
> > Jerry
> >
> >
> >         ----- Original Message -----=20
> >         From: J=F3n Fr=EDmann
> >         To: PSN-Postlist
> >         Sent: Wednesday, March 10, 2010 9:17 PM
> >         Subject: More then 2000 files
> >
> >
> >         Hi all,
> >
> >         The activity continues in Eyjafjallaj=F6kull volcano. So far I
> >         have
> >         recored more then 600 earthquakes or so. The activity
> >         continues and
> >         doesn't seems to be stopping.
> >
> >         When I write this there are 2078 files in the folder for Mars
> >         2010. Most
> >         of the earthquakes that I have recored are microquakes.
> >
> >         Regards,
> >         --=20
> >         J=F3n Fr=EDmann J=F3nsson
> >
> >         __________________________________________________________
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