[irised] Frequency vs. Magnitude

[Katie Stofer]

 From the Maryland Science Center ...

I have a more general question about quakes that I hope one of the 
experts can help me with. We have been using a machine to simulate 
earthquakes that ostensibly varies magnitude - Pitsco's Epicenter 
Earthquake Simulator. They no longer make this and now sell instead the 
EQ Tremor Table 
<http://catalog.pitsco.com/store/detail.aspx?KeyWords=engineering&by=20&ID=4229&c=0&t=0&l=0>, 
which, instead of magnitude, varies cycles per second (frequency), from 
0-30, "in the range of P waves." So, is there a relationship between 
frequency and magnitude (the latter being the one that school groups 
visiting the science center are more familiar with)? Was our original 
machine really varying magnitude (being built, as far as I can tell, on 
some sort of belt sander with a variable voltage control), or just 
frequency as far as anyone can tell?

Any ideas/insight are appreciated before I rewrite our entire program 
due to a broken simulator!

Thanks,
Katie Stofer

-- 
--
Kathryn Stofer
TerraLink Exhibit Manager
Maryland Science Center
601 Light Street
Baltimore, Maryland 21230
410/545-5976
410/545-5974 fax
BODYWORLDS - Coming to MSC Feb. 2 - Sept. 1, 2008!

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