Hello

And I live in Oslo, Norway, about 600,000 people.  I live 25 meters
away from one of the tram/underground lines, which is no problem at
all even for my geophones.  We can easily hear the trains as a slight
rumble, but they hardly show up on the 4.5 Hz geophones.  The
frequency of most of the noise seems to high to become much trouble.

The geophones do pick up more noise during the daytime, probably
mostly due to local car traffic, but this I would rate far below other
sources of noise.  The primary noise (for the seismometer) is the
turbulent sea in western Norway about 400 km away (might last for
days).  Then there are wind gusts (> ~5 m/s) making our house shake
(shows up on the geophone).  And activity in our house (walking,
washing machine, etc).  Then I'd say city noise.

I can easily pick up 1.0 mag quakes within 50 km on the geophones
during night time, and usually during day time as well.  A 5.0 quake
usually has to be closer than 7500 km to show up on the seismometer,
but if the western coast is stormy, even a 6.0 quake at this distance
will require some filtering to become visible.

-Steinar

jzambory@......... writes:

> Hi Jon,
>
> I live in Calgary, Canada, population, over 1,000,000. I have a home made Lehman and I 
> record earthquakes quite easiely. Look for JZAB in the PSN listings of quakes. I live close to 
> a major 4 lane road that gives me a lot of noise during the day, but I am able to filter that out 
> quite easily with WinQuake. Sometimes it is a little hard to see the quakes on the trace but if I 
> do a little filtering, they come out quite nicely.
>
> Hope this helps. Good luck!
>
> Jeff
>
> On 17 Apr 2011 at 0:50, Jón Frímann wrote:
>
>> Hello all,
>> 
>> In a few years time I am going to move to Germany (after I move back to
>> Iceland in June 2011), close to the West Eifel Volcanic Field
>> (http://www.volcano.si.edu/world/volcano.cfm?vnum=0100-01-)
>> 
>> It might well be that the smaller towns don't fit my plans. As I am
>> going to try avoding owning a car in Germany.
>> 
>> The populations in the towns and cities are from 10.000 (Daun) and up to
>> 1 million (Köln).
>> 
>> But I want to know how it is to record a earthquakes in big towns. I am
>> currently living in Denmark, in Sřnderborg. That town has a popluation
>> close to 28.000 people. There is a lot of noise on my geophone. But I am
>> up on the 3rd floor (2nd floor danish system). So the resaults that I am
>> getting a bit noise because of this.
>> 
>> Does anyone here have experience on how to record earthquakes in larger
>> towns ? Is it possible to start with ?
>> 
>> Regards,
>> Jón Frímann.
>> 
>> __________________________________________________________
>> 
>> Public Seismic Network Mailing List (PSNLIST)
>> 
>> To leave this list email PSNLIST-REQUEST@.............. with 
>> the body of the message (first line only): unsubscribe
>> See http://www.seismicnet.com/maillist.html for more information.
>
>
> __________________________________________________________
>
> Public Seismic Network Mailing List (PSNLIST)
>
> To leave this list email PSNLIST-REQUEST@.............. with 
> the body of the message (first line only): unsubscribe
> See http://www.seismicnet.com/maillist.html for more information.
__________________________________________________________

Public Seismic Network Mailing List (PSNLIST)

To leave this list email PSNLIST-REQUEST@.............. with 
the body of the message (first line only): unsubscribe
See http://www.seismicnet.com/maillist.html for more information.