ARPSN Amateur Radio Public Seismic Network
Cobb [Mountain], CA - FFT-CSP Animation - March 2009

Channel One - North/South

Channel Two - East/West

For More Information:
A New Look at an Old Tool:
the Cumulative Spectral Power of Fast-Fourier Transform Analysis
Sheng-Chiang Lee and Randall D. Peters
Physics Department, Mercer University, Macon, GA 31207
http://www.flyingsnail.com/AmateurRadio/VolksMeter-FFT-CSP.html