A method, comprising: receiving , by a processor, a plurality of reflected acoustic signal measurements acquired in response to emission of acoustic waves by one or more sensors disposed in a wellbore within a target region, wherein each reflected acoustic signal measurements represents a strength of reflected acoustic waves as a function of time measured in at least one predetermined direction oriented with respect to an axis of the wellbore; generating , by the processor, a fracture extension estimate representing a length of fracture within an area extending from the wellbore within the target region in at least one predetermined direction, characterized in that generating the fracture extension estimate includes, determining a fracture intensity threshold for each of the plurality of reflected acoustic signal measurements, wherein the applied threshold is utilized to suppress noise in the cumulative fracture intensities for each reflected acoustic signal measurement, and determining , based on the determined fracture intensity threshold, the fracture extension estimate for each of the plurality of reflected acoustic signal measurements, generating , by the processor, a three-dimensional fracture network model corresponding to the fracture extension estimates generated for each of the plurality of reflected acoustic signal measurements, and outputting , by the processor, the three-dimensional fracture network model. receiving , by a processor, a plurality of reflected acoustic signal measurements acquired in response to emission of acoustic waves by one or more sensors disposed in a wellbore within a target region, wherein each reflected acoustic signal measurements represents a strength of reflected acoustic waves as a function of time measured in at least one predetermined direction oriented with respect to an axis of the wellbore; generating , by the processor, a fracture extension estimate representing a length of fracture within an area extending from the wellbore within the target region in at least one predetermined direction, characterized in that generating the fracture extension estimate includes, determining a fracture intensity threshold for each of the plurality of reflected acoustic signal measurements, wherein the applied threshold is utilized to suppress noise in the cumulative fracture intensities for each reflected acoustic signal measurement, and determining , based on the determined fracture intensity threshold, the fracture extension estimate for each of the plurality of reflected acoustic signal measurements, determining a fracture intensity threshold for each of the plurality of reflected acoustic signal measurements, wherein the applied threshold is utilized to suppress noise in the cumulative fracture intensities for each reflected acoustic signal measurement, and determining , based on the determined fracture intensity threshold, the fracture extension estimate for each of the plurality of reflected acoustic signal measurements, generating , by the processor, a three-dimensional fracture network model corresponding to the fracture extension estimates generated for each of the plurality of reflected acoustic signal measurements, and outputting , by the processor, the three-dimensional fracture network model. <EOS>