A very unusual change is reported in the morphology of the Jovian Ly-&agr; bulge, a region of enhanced Ly-&agr; emission near the Jovian spin equator at a fixed system III magnetic longitude (&lgr;III) that has persisted since its discovery in the late 1970s. Observations from 1979--March 1989 consistently showed Ly-&agr; emission that peaked near &lgr;III~100¿ then dropped and remained constant in the nonbulge region from &lgr;III~200--360¿. During this time the bulge had a full width half maximum (FWHM) of ~100--130¿. In September 1989 and March and May 1991 this nomimal morphology was substantially different: the Ly-&agr; brightness showed a much broader peak (FWHM ~200¿) centered near 40¿ meaning that the bulge encompassed nearly the entire equatorial region of the planet and the previously flat nonbulge region was virtually nonexistent. These observations show a fundamental change in the morphology of the Ly-&agr; bulge which was not observed in the previous 11 years. Present theories for the bulge invoke asymmetric processes or densities in the Jovian ionosphere. The change in bulge morphology may imply a significant change in the pattern of large-scale magnetospheric convection, in turn implying a possible change in longitudinal density structure of the Io plasma torus between March and Sept 1989. The possibility that the observed change in bulge morphology is related to long-term solar activity also cannot be ruled out.