DRAMATIC EMISSION-LINE VARIATIONS IN QSO KAZ-102 AND POSSIBLE CAUSES

We report optical spectroscopic observations of the radio-quiet quasar Kaz 102. We find impressive variations of the H alpha emission line b oth in shape and intensity. H alpha dimms by 40%, and develops a blue asymmetry within a few years. The continuum level also decreases by a similar amount. We discuss the results in terms of the kinematics of t he BLR (Broad Line Region), and consider several plausible scenarios: The association of the BLR to Supernovae Remnants evolving in a dense medium, the emission from two BLRs in a binary black hole system, emis sion from clouds whose motion is predominantly radial coupled with lig ht echoes, and variations in the distribution of a small number of clo uds.