Rapid structural variations in 3C 120

VLBI observations of the radio galaxy 3C 120 at 2.8 and 6.0 cm between 1978.24 and 1980.27 are presented. The source consists of a highly variable linear emission region with a relatively stable, compact component at one end, suggestive of a ''core-jet'' morphology. The observations were not frequent enough and did not have sufficient dynamic range to clearly show the evolution of individual components, with the probable exception of one bright component which appeared to separate from the ''core'' at an apparent rate of 3.7 +- 0.8 times the speed of light (H/sub 0/ = 55 km s/sup -1/ Mpc/sup -1/) during 1979.