Normalized HST spectra of the Lyα region from five different epochs as labeled. Velocity is for Lyαλ1215.67 relative to the host galaxy systemic redshift of z = 0.00973 (Theureau et al. 1998). Fluxes are normalized to range from 0 to 1. Epochs prior to 2016 are offset vertically by 0.2, 0.4, and 0.9, with the offset normalizations indicated by thin horizontal black lines. The velocities of Components 1–4 as given by Gabel et al. (2003b) are marked by thin vertical blue lines and labeled.