This paper treats the tectonic aspects of the Kum-Dag earthquake of 1983 in western Turkmenia, particularly the morphology and kinematics of its surface expression, as well as its geodynamic features, its setting in the Late Quaternary structure and in the current tectonic pattern. A seismogenic rupture occurred, by which is meant emergence of the focal rupture on the surface, which was examined in detail in 1983. The authors are with the Institute of Geologic Sciences. Features of the surface trace nicely match the character of the fault zone as indicated by regional geology and by seismologic data. Kum-Dag is in the Nebit-Dag oil producing district. The seismogenic rupture, dynamic parameters of the main earthquake focus, and the structural setting of the earthquake focus are discussed. 28 references, 5 figures.