S waves and P waves are earthquake body waves. S and P stand for
A) sudden and post.
B) sigma and pi.
C) slow and proper.
D) secondary and primary.

Question

Quizplus · Accepted Answer

S waves (Secondary waves) and P waves (Primary waves) are types of seismic waves generated by earthquakes. P waves are the first to arrive at a recording station, hence "primary," and S waves follow, thus termed "secondary."

S Waves and P Waves Are Earthquake Body Waves