Transient absorption components in 16 May 1998. The high resolution observed spectrum of several lines (solid lines) is plotted along with the synthetic photospheric spectrum (dashed lines; Kurucz 1993). The short vertical dashes mark the approximate location of the metallic-only transient absorptions at +50 km s^-1. A transient red-shifted component of velocity v ~ 50 km s^-1 is clearly seen in the metallic but not the hydrogen lines. In addition a blue-shifted absorption is identified in all lines for v   ~   −100 km s^-1.