Today's 7.0 Okhotsk quake was recorded by my SEP seismometer.  Not a
huge signal, but clear enough.

Sac-file: http://voksenlia.net/nytt/2008/jordskjelv-20081124.sac
PNG image: http://voksenlia.net/nytt/2008/jordskjelv-20081124.png

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: http://voksenlia.net/nytt/2008/jordskjelv_z-20081124.sac
PNG image Z: http://voksenlia.net/nytt/2008/jordskjelv_z-20081124.png
Sac-file N: http://voksenlia.net/nytt/2008/jordskjelv_n-20081124.sac
Sac-file E: http://voksenlia.net/nytt/2008/jordskjelv_e-20081124.sac

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
http://voksenlia.net/met/
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