PSN-L Email List Message

Subject: RE: No intrest in earthquakes ?
From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@.........
Date: Mon, 22 Feb 2010 23:43:10 +0000

Hi Gary,

Isn't the FBV seismometer a low frequency seismometer. I am sure that is
why you are detecting earthquakes from the South Pacific. What is the
absolute minimal size that you can detect ? With my 4.5Hz seismometer I
can go down to ML0.01 when weather is good.

Here is how a volcano tremor looks like on my system. This is filtered
at 2Hz.

The movement was most at E-W sensor. But I guess that is the direction
the magma was pushing when this earthquake did happen.

J=F3n Fr=EDmann.

On m=E1n, 2010-02-22 at 15:19 -0800, Gary Lindgren wrote:
> Jon,
> I'm sorry we don't have enough discussions on earthquakes. I'll start her=
> I have a FBV seismometer built along the design of Dave Nelson and Brett
> Nordgren. It is extremely sensitive. I live in California and notice that
> most of the earthquakes I see are in the South Pacific. Is this the hot a=
> around the world or am I seeing them because I have the open ocean from m=
> location.
> Gary
> -----Original Message-----
> From: psn-l-request@.............. [mailto:psn-l-request@............... =
> Behalf Of J=F3n Fr=EDmann
> Sent: Monday, February 22, 2010 2:40 PM
> To: PSN-Postlist
> Subject: No intrest in earthquakes ?
> Hi all,
> I often see here technical discussion about seismometers and geophones
> here. But what I don't see are disscusions about earthquakes, and even
> volcanoes.=20
> Can someone explain to me why that is. I am recording earthquakes
> because I have intrest in them.
> Regards,=20


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