1. A computer-implemented method for analyzing microseismic data from a fracture treatment, the method comprising: identifying a plurality of fracture planes based on microseismic event data associated with a fracture treatment of a subterranean zone, each fracture plane associated with a subset of the microseismic event data; identifying a plurality of confidence level groups from the plurality of fracture planes, each confidence level group including a plurality of fracture planes that have an accuracy confidence value within a respective range; and generating, by data processing apparatus, a graphical representation of the fracture planes, the graphical representation including a distinct plot for each confidence level group.