The coordinated simple spike activity of neighboring Purkinje cells has been studied extensively using electrophysiological techniques in both awake animals and cerebellar slices (Person and Raman, 2012). However, electrophysiological recordings have restricted the spatial extent to which this coordination has been examined. We demonstrate that fluorescent calcium indicators can be used as a highly effective readout of simple spike activity, and allow the monitoring of this activity in many Purkinje cells simultaneously. By imaging multiple Purkinje cells, a degree of spatial information is retained and it becomes possible to probe components of the cerebellar circuit and view how information flows out of the cerebellar cortex via these cells. Using this method to examine spontaneous Purkinje cell activity, we find highly coordinated pauses between cells that is dependent upon GABA-A receptor activation. Furthermore, activation of molecular layer interneurons with either electrophysiological or channelrhodopsin stimulation, induces pauses that are coordinated between neighboring Purkinje cells. These coordinated pauses are likely play a large role in controlling spiking of the deep cerebellar nuclear cells which in turn output the information from the cerebellum.