OK, thanks larry. I sent it to seismicnet. If all is
well, everyone should be able to see it at:
http://www.seismicnet.com/cgi-dos/event.exe

Pete
--- Larry Cochrane  wrote:

> Hi All,
> 
> This is a reminder that you can not send attachments
> to the PSN-L list. If you have a 
> file you would like to share with the group you will
> need to place it on a web/ftp 
> server somewhere and send the link to the file to
> the list. If you do not have access 
> to a web server I can place the file on my system.
> 
> If you have a PSN event file you would like to share
> with the group you can send them 
> to event@.............. as attachments. The event
> file(s) will show up on this page 
> http://www.seismicnet.com/cgi-dos/event.exe a few
> minutes after my mail server 
> receives the message.
> 
> Regards,
> Larry Cochrane
> Redwood City, PSN
> 
> Pete Rowe wrote:
> > Hi all
> > I sent the following message with a pdf of my
> > recording but it bounced back as too large for the
> > group. I'm not sure how to send it any other way.
> > Pete
> > 
> > 
> > Here is my recording of the Guatemalan quake
> today. As
> > Jan mentioned, my seismometer is the size of a
> > shoebox, has a three second period, is critically
> > damped with a resistor across the coil, has almost
> no
> > weight on the boom, and I can see a 7.0 anywhere
> on
> > earth. The suspension is two fine steel wires
> (violin
> > E string) both of which are in tension. This sits
> on
> > the dirt under my house. The noise level is higher
> > than normal today due to wind in the trees.
> Normally,
> > I have a very quiet baseline. It has been running
> > almost untouched since 1988.
> > 
> > regards,
> > Pete Rowe
> > San Jose, CA
> > --- Jan Froom  wrote:
> > 
> >> I can remember when Pete Rowe and I first started
> >> playing around with 
> >> amateur seismometers... I built a large unit with
> a
> >> long boom with a 
> >> very heavy mass. Pete built a little unit, with
> no
> >> mass on his boom at 
> >> all. I had my unit mounted on three massive
> concrete
> >> piers... Pete set 
> >> his unit on a scrap of 2X4 under his house...
> >> Funny thing... we both got about the same
> results...
> >> and Pete didn't 
> >> have half the problems I had.
> >> Pete finally put a small fish weight on the end
> of
> >> his boom... I sure... 
> >> simply to appease me.
> >> 
> >> I've also come to the conclusion that the antique
> >> seismometers I've 
> >> collected all have large masses and huge coils
> >> simply because they had 
> >> to generate enough power to drive a pen motors
> >> directly, with no 
> >> external amplification. With today's amplifiers
> and
> >> technology you can 
> >> do a whole lot more with a whole lot less.
> >> 
> >> Since the only response to my query about drum
> >> recorders came from 
> >> Chris... I took his advice and took an aspirin
> and
> >> thought about my 
> >> problem. I've decided to take advantage of the
> >> antique nature of what I 
> >> have, and capitalize on that. Part of what I've
> >> tried to inspire in the 
> >> kids I've worked with... is the simplicity of a
> >> seismic monitoring 
> >> system... the simplicity of a whole lot of
> "complex"
> >> scientific 
> >> devices... what better way then to let them see
> the
> >> simple pieces up 
> >> close... and if it looks a bit  "Rube
> >> Goldbergish"... well that will be 
> >> kool too.
> >> 
> >> Jan in Gilroy.
> >> 
> > 
> > 
> > 
> > 
> >  
> >
>
____________________________________________________________________________________
> > Need Mail bonding?
> > Go to the Yahoo! Mail Q&A for great tips from
> Yahoo! Answers users.
> >
>
http://answers.yahoo.com/dir/?link=list&sid=396546091
> >
>
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> > 
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> > 
> > 
> 
>
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