Sophie---It is always good to hear from young people interested in seismic
related topics.  Sensors generally are in three categories----Geophones, the
AS-l Educational Design, and the "Lehman" long period type design.  Each of
these designs have their own strengths in terms of simplicity and
performance.  Information and plans on any of these sensors are available on
the Public Seismic Network, or sources suggested.  Don't hesitate to ask
questions--there is a lot of good help on the Public Seismic Network--
Jim
----- Original Message -----
From: "Sophie Talbot" 
To: Sophie
Sent: Thursday, November 02, 2006 6:44 PM
Subject: What sensor to build


> Hello,
> My name is Sophie, I am 11 years old and I want to build a seismometer
> system to investigate earthquakes. I live in England so most big
> earthquakes I would like to detect are a long way away but I would also
> like to detect the blasting in the quarry about a mile away if I can.
> I have read lots of interesting things on the web page but am not sure
> what sort of sensor would be best for me and dad to make. Can you help
> me decide which sort to build
> Thanks
> Sophie
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