Microseismic data acquisition, processing, and event characterization at the Illinois Basin – Decatur Project

•Description of the IBDP microseismic monitoring network.•Description of the IBDP microseismic data processing and event characterization workflows.•Several event clusters features displayed detectable linearity suggesting geologic control.•The velocity model evolved and improved as new data became available.•Velocity anisotropy had a systematic impact on event locations.