Observations of five impulsive microwave bursts were made during July 15–18, 1978 using the VLA at 4.9 GHz with temporal and spatial resolutions of 10 s and up to 1″ respectively. A series of 2-dimensional snapshot synthesis maps was made as a function of time, and compared with Hα photographs and magnetograms. Each flare was characterized by a single source of constant size, located on the magnetic neutral line between the Hα kernels.