Question

What is the history of the seismograph?

Answer 1

"Modern" Seismology's rich history begins with Robert Hooke's 1676 "True Theory of Elasticity or Springness" paper and continues through the 1830 discovery of P and S waves, the 1930's discovery of the inner core by Inge Lehman,

Explanation:

Ref: https://www.iris.edu/hq/resource/the_history_of_seismology

A nice history going back to ancient China is given here:
http://softschools.com/inventions/history/seismograph_history/172/