In a message dated 20/01/2006, jonfr500@......... writes:

I am  wondering about noise on my geophone. I have moved my geophone
outside so I  have mostly got rid of the noise from inside the house. But
now I get  the noise from the weather, traffic and so on a lot more then
when it was  inside my apartment. However I hope to detect earthquake
better  then I did before.


Hi Jon,
 
    Have you sealed the plastic case? Are the geophones  above the ground 
surface, on the surface, or below the surface? Is there a  container over the 
top? 
 
    Is there any possibilty of digging a hole maybe 1 m  deep and putting in 
a large diameter plastic pipe or similar, sealed at the top  and the bottom? 
It needs to be completely weather proof. 
 
    How do the actual noise levels compare with those  when the geophones 
were in the apartment? Can you compare 'before' and 'after'  recordings? 
 
    A professional seismometer pit is described at 
_http://www.guralp.net/services/stations/eskdalemuir/_ 
(http://www.guralp.net/services/stations/eskdalemuir/) 
 
    Regards,
 
    Chris Chapman






In a message dated 20/01/2006, jonfr500@......... writes:
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  wondering about noise on my geophone. I have moved my geophone
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  have mostly got rid of the noise from inside the house. But
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  the noise from the weather, traffic and so on a lot more then
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  inside my apartment. However I hope to detect earthquake
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  then I did before.

Hi Jon,
 
    Have you sealed the plastic case? Are the geoph=
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above the ground surface, on the surface, or below the surface? Is there a=20
container over the top? 
 
    Is there any possibilty of digging a hole maybe=
 1 m=20
deep and putting in a large diameter plastic pipe or similar, sealed at the=20=
top=20
and the bottom? It needs to be completely weather proof. 
 
    How do the actual noise levels compare with tho=
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when the geophones were in the apartment? Can you compare 'before' and 'afte=
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recordings? 
 
    A professional seismometer pit is described at=20=
http://www.gur=
alp.net/services/stations/eskdalemuir/
 
    Regards,
 
    Chris Chapman