PSN-L Email List Message

Subject: Re: Okhotsk quake
From: jonfr@.........
Date: Tue, 25 Nov 2008 19:10:36 -0000 (UTC)


The signal from this earthquake did also appear on my sensor in Iceland.
Both on hvt sensor and hkb sensor far as I can tell. I will send in the
trace later on, when I have finish school.

Jón Frímann.

> Today's 7.0 Okhotsk quake was recorded by my SEP seismometer.  Not a
> huge signal, but clear enough.
> Sac-file:
> PNG image:
> However, what's a bit surprising is that at the exact same time of the
> arrival of the P wave my 4.5 Hz geophone recorded something pretty
> strong as well for a few minutes.  Mostly in the Z direction but
> clearly in the other directions as well.
> Sac-file Z:
> PNG image Z:
> Sac-file N:
> Sac-file E:
> Will a quake nearly 7000 km away every show up on a 4.5 Hz geophone?
> Or could a distant quake trigger a small local quake?  Or are the
> events unrelated?
> Since this happened in daytime, and it's a bit windy outside today
> also, there is quite a bit of noise, but the quakes are clear enough.
> --
> Steinar Midtskogen
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