A variety of mechanisms have been proposed to account for transient events observed in the vicinity of the dayside magnetopause. Discriminating among the various proposed mechanisms is a key objective of magnetospheric physics but requires careful consideration of their predictions. Song et al. (1994) recently reported the results of an effort to determine the characteristics of transient events produced by variations in the solar wind dynamic pressure. Noting that the observed characteristics did not coincide with those they predicted, they concluded that transient events in the vicinity of the dayside magnetopause could not be caused by solar wind dynamic pressure variations. In this rebuttal, we call attention to our previous work concerning the expected characteristics of transient events produced by variations in the solar wind and foreshock pressure; that work uses more realistic parameters to conclude that the transient events are consistent with a solar wind/foreshock pressure mechanism. ¿ American Geophysical Union 1995