Three seismograms for a single earthquake with an epicenter in Columbia are shown below. The data are from stations that were at very different distances from the epicenter. Arrows denote arrival of P and S waves. Note: Vertical scales are not all the same. 
Suppose you were near the epicenter and felt the Earth move as if you were in the ocean. What type of seismic wave would you have experienced?
A. S-wave
B. Surface wave
C. P-wave
Answer: B
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