A seismograph station is located 2000 km from an earthquakes epicenter. Explain the order that the S and P waves will arrive at the station.

Answer 1

http://www.sciencecourseware.org/VirtualEarthquake/VQuakeExecute.html

Answer 2

The P type of wave travels fastest. That wave will arrive first, after a delay of (2000 km)/Vp The S wave arrives later.

I suggest you review this web site for more details:

http://eqseis.geosc.psu.edu/~cammon/HTML/Classes/IntroQuakes/Notes/waves_and_interior.html