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Subject: Glacial outburst flood in Vatnajokull coming from Skaftarkatli
From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr500@.........
Date: Sat, 22 Apr 2006 13:19:57 +0000

Hi all

The eastern Skaftarkatli has erupted and has created a glacial outburst
flood. It has reached low level lands. It has already reached the town
Kirkjubæjarklaustur (the town is save, no worryes about that), but
Skaftá river flows close by it. It is expected that the glaciar outburst
flood is expected to reach it's peak in a two days time. It is also
expected that this is going to be rather big flood.

Last flood there was in August last year. Following that flood there was
an event of harmonic tremor, that did last for about ~12 hours. Such
event is problay going to follow this glaciar outburst flood. This flood
also opens up the possibliti of a eruption in the volcano that is under
the ice there, but the volcano is often called "Hamarinn", is in the
Bardarbunga volcano rupture zone. But the eruption is possible becose of
the pressure change that happens on top of the volcano. In the year
2004, the trigger for the eruption in Grimsfjall caldera was a flood
that did start two days earlyer.

I do not know for sure if the harmonic tremor are going to show up on my
geophone, but given that harmonic tremor frequancy is from 0.5Hz up to
60Hz (maybe higer) it is possible that i might see the harmonic tremor.
This harmonic tremor problay won't happen after one or three days from
now, but i am unsure of that time estimate that i have. I am just going
to have to wait and see.

I can replay more info for those who are intrested. But i am waiting for
more news on this and on what exacly is happening.

Jón Frímann


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