With reference to the figure below, when seismic waves arrive at a recording station, which wave always arrives first? An illustration shows the output paper from a seismograph. Surface waves are the largest. a. the R or Rayleigh wave b. the S or secondary wave c. the P or primary wave d. No general statement can be made about the arrival sequence; it depends on the characteristics of the rocks the waves are propagating through. e. the L or Love wave