ted@.......... wrote:
> 
>> The question is, should you put the strong motion sensor in the attic so
> less of the house will fall on it?
> 

I'm relatively sure you're speaking tounge-in-cheek, but your first
strong-motion sensor should be placed on solid (or what passes for solid
in your area) ground.  If you put the sensor in the structure,
especially the attic, it will record the natural resonances of the
building, not the ground spectra which are of interest to structural
engineers and microzonation enthusiasts.

Large high rise buildings typically have at least three strong-motion
seismographs, one in the basement, one in the roof and one in the
middle, wired together with a common time base.  The purpose is of
course to record the driving force in the basement and the structural
response of the building to the shaking.  It's a tool for better
aseismic design of structures.

_____________________________________________________________________

Public Seismic Network Mailing List (PSN-L)