Here's why:

* Seismology is the branch of geophysics that focuses on earthquakes and the propagation of elastic waves through the Earth.

* These waves, called seismic waves, are what seismologists study to understand the structure and composition of the Earth's interior.

* Seismic waves are generated by earthquakes, volcanic eruptions, and even human-made explosions.

Let me know if you'd like to know more about seismology or the types of seismic waves!