1. A non-transitory computer-readable medium encoded with instructions that, when executed, perform operations comprising: generating a plurality of distinct fracture pattern models based on sampling an initial probability distribution of values for a fracture parameter, each distinct fracture pattern model including a distinct set of model fracture locations; comparing the set of model fracture locations in each fracture pattern model to microseismic event locations for a subterranean region, the same microseismic event locations being compared against each distinct set of model fracture locations, wherein comparing the set of model fracture locations comprises: generating a plurality of map images, each map image comprising a representation of one of the plurality of fracture pattern models and a representation of the microseismic event locations; presenting the plurality of map images in a graphical user interface; and at least one of: receiving user input through the graphical user interface, the user input identifying at least one of the fracture pattern models as an accurate representation of the microseismic event locations; or receiving user input through the graphical user interface, the user input identifying at least one of the fracture pattern models as an inaccurate representation of the microseismic event locations; and generating, from the initial probability distribution, a refined probability distribution for the fracture parameter based on the comparison between the model fracture locations and the microseismic event locations.