• is this power law? (remember: magnitude is a log scale)
  • January 1932: the origin of the Richter magnitude scale
  • Why scientists no longer use the Richter magnitude scale

    here is energy by frequency from the same source (power=1.7~2)


  • West, G.B., Brown, J.H. & B.J.Enquist (1997) A general model for the origin of allometric scaling laws in biology. Science 276:122-126. (PDF Reprint)
  • Allometric scaling in biology (commentary)
  • download 1st excel file for Zipf power-law distribution on word frequency
  • download 2nd excel file for Zipf power-law distribution on word frequency