## PSN-L Email List Message

Subject: RE: No intrest in earthquakes ?
From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@.........
Date: Tue, 23 Feb 2010 17:44:48 +0000

```Hi Gary,

I have not been to Hawaii, as I cannot afford it at the moment. The
Hawaii volcano is a slow lava, it comes forward slowly and does the
damage when it comes down. The volcanoes in Iceland are the most common
types. The one that are like the one in Hawaii and the one that makes a
ash clould. Sometimes that is a mixture of both.

With my first ever harmonic tremor recorded this weekend. I know that my
plots are going to look intresting the Hekla volcano starts erupting.
But my Heklubygg=F0 seismomiter is only about ~12km away from that
volcano.

Regards,
J=F3n Fr=EDmann.

On =FEri, 2010-02-23 at 08:26 -0800, Gary Lindgren wrote:
> Hi Jon,
> I want to get a good clean display and will need another 12 hours and the=
n
> I'll put the cover back on. With you interest in volcanoes, have you ever
> been to Hawaii and up to Volcanoes National Park and watched the eruption=
s.
> They also have a nice earthquake research station there too. The lava is
> usually flowing. A few years ago I was at the area with lava flowing and =
was
> there before sunrise and before the ranger was there and was able to see
> lava flow at my feet, really. It was all very safe.
> Gary
>=20
>=20
>  =20
>=20
> -----Original Message-----
> From: psn-l-request@.............. [mailto:psn-l-request@............... =
On
> Behalf Of J=F3n Fr=EDmann
> Sent: Tuesday, February 23, 2010 7:26 AM
> To: psn-l@..............
> Subject: RE: No intrest in earthquakes ?
>=20
> Hi Gary,
>=20
> Did you get the resaults from it that you did want ?
>=20
> Regards,
> J=F3n Fr=EDmann.
>=20
> On m=E1n, 2010-02-22 at 18:06 -0800, Gary Lindgren wrote:
> > Jon,
> > Yes I'm testing the seismometer without the case, it is now exposed to =
the
> > open air and any changes in the atmospheric pressure, I thought it woul=
d
> > calm down by now. I wanted plots with and without the pressure case.
> > Gary
> >=20
> >=20
> >=20
> >=20
> > -----Original Message-----
> > From: psn-l-request@.............. [mailto:psn-l-request@...............
]
> On
> > Behalf Of J=F3n Fr=EDmann
> > Sent: Monday, February 22, 2010 5:40 PM
> > To: psn-l@..............
> > Subject: RE: No intrest in earthquakes ?
> >=20
> > Hi Gary,
> >=20
> > Are you testing your seismometer for something special ? I do see the
> > response on your plot. It is as one would expect from a sensivite
> > instrument like the one you have.
> >=20
> > At ~482km distance from a volcano you won't record any of the harmonic
> > tremors the volcano can make. But you might see earthquakes from the
> > volcano if it makes a Mb5.0 happen.
> >=20
> > Regards,
> > J=F3n Fr=EDmann.
> >=20
> > On m=E1n, 2010-02-22 at 17:31 -0800, Gary Lindgren wrote:
> > > Jon,
> > > The nearest volcano is probably 300 miles away. The case is excellent=
.. A
> > few
> > > minutes ago I remove the cover in order to record the response withou=
t
> the
> > > cover and open to the atmosphere. It's going to take awhile for the u=
nit
> > to
> > > calm down.
> > > Gary
> > >=20
> > >=20
> > >=20
> > >=20
> > > -----Original Message-----
> > > From: psn-l-request@.............. [mailto:psn-l-request@.............
om]
> > On
> > > Behalf Of J=F3n Fr=EDmann
> > > Sent: Monday, February 22, 2010 4:57 PM
> > > To: psn-l@..............
> > > Subject: RE: No intrest in earthquakes ?
> > >=20
> > > Hi Gary,
> > >=20
> > > Thanks for the link. This is quite intresting. Are you near any volca=
no
> > > in CA, USA ?
> > >=20
> > > You must record some local earthquake near you. How is your sensor
> > > working out in those cases ?
> > >=20
> > > Regards,
> > > J=F3n Fr=EDmann.
> > >=20
> > > On m=E1n, 2010-02-22 at 16:06 -0800, Gary Lindgren wrote:
> > > > Jon,
> > > > Today I detected the Tonga M6.0 and M5.3 quakes, 77 degrees away. A=
nd
> > the
> > > > Kermandec Islands M5.2, 82 degrees away. I filter Low pass .08Hz an=
d
> > high
> > > > pass .02Hz.
> > > > With the filters I'm using I'm looking for the long range quakes. T=
he
> > > > seismometer has a flat response from 100 seconds to 20Hz. See
> > > > http://www.blue-eagle-technologies.com/seismo1.html The data is
> updated
> > > > every 10 minutes.=20
> > > > Gary
> > > >=20
> > > >=20
> > > > =20
> > > >=20
> > > > -----Original Message-----
> > > > From: psn-l-request@..............
> [mailto:psn-l-request@...............
> > > On
> > > > Behalf Of J=F3n Fr=EDmann
> > > > Sent: Monday, February 22, 2010 3:43 PM
> > > > To: psn-l@..............
> > > > Subject: RE: No intrest in earthquakes ?
> > > >=20
> > > > Hi Gary,
> > > >=20
> > > > Isn't the FBV seismometer a low frequency seismometer. I am sure th=
at
> is
> > > > why you are detecting earthquakes from the South Pacific. What is t=
he
> > > > absolute minimal size that you can detect ? With my 4.5Hz seismomet=
er
> I
> > > > can go down to ML0.01 when weather is good.
> > > >=20
> > > > Here is how a volcano tremor looks like on my system. This is filte=
red
> > > > at 2Hz.
> > > >=20
> > > >
> > >
> >
> http://seismicnet.com/cgi-dos/makegif.exe?/quakes/1002/100220.180800.hkbz=
..ps
> > > > n
> > > >
> > >
> >
> http://seismicnet.com/cgi-dos/makegif.exe?/quakes/1002/100220.180800.hkbn=
..ps
> > > > n
> > > >
> > >
> >
> http://seismicnet.com/cgi-dos/makegif.exe?/quakes/1002/100220.180800.hkbe=
..ps
> > > > n
> > > >=20
> > > > The movement was most at E-W sensor. But I guess that is the direct=
ion
> > > > the magma was pushing when this earthquake did happen.
> > > >=20
> > > > Regards,
> > > > J=F3n Fr=EDmann.
> > > >=20
> > > > 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
> > > > here.
> > > > > I have a FBV seismometer built along the design of Dave Nelson an=
d
> > Brett
> > > > > Nordgren. It is extremely sensitive. I live in California and not=
ice
> > > that
> > > > > most of the earthquakes I see are in the South Pacific. Is this t=
he
> > hot
> > > > area
> > > > > around the world or am I seeing them because I have the open ocea=
n
> > from
> > > my
> > > > > location.
> > > > > Gary
> > > > >=20
> > > > >=20
> > > > >=20
> > > > >=20
> > > > > -----Original Message-----
> > > > > From: psn-l-request@..............
> > [mailto:psn-l-request@...............
> > > > On
> > > > > Behalf Of J=F3n Fr=EDmann
> > > > > Sent: Monday, February 22, 2010 2:40 PM
> > > > > To: PSN-Postlist
> > > > > Subject: No intrest in earthquakes ?
> > > > >=20
> > > > > Hi all,
> > > > >=20
> > > > > 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
> > > > >=20
> > > > > Can someone explain to me why that is. I am recording earthquakes
> > > > > because I have intrest in them.
> > > > >=20
> > > > > Regards,=20
> > > >=20
> > > > __________________________________________________________
> > > >=20
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> > > >=20
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> > > >=20
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> > > >=20
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