NOVELTY - The method (90) involves receiving a seismic signal having amplitude from each event in several subsurface events. The undetected events and an attribute for each of the undetected events are estimated (93). The undetected events and corresponding attributes are estimated using the seismic signal and corresponding amplitude. The parameter is estimated (94) using the seismic signal and the corresponding attributes of the undetected events, such that each of the estimating undetected events and the estimation of parameter is performed using several processors.    USE - Method for estimating parameter of subsurface volume, for use in geothermal industry.    ADVANTAGE - Fracturing increases the number of fractures in the rock or opens existing fractures to enhance permeability in the formation that increases the production rate or fluid conductivity of the formation. The stimulated reservoir volume that relates to a volume in an earth formation reservoir is effectively stimulated, in which the permeability of the volume is increased to allow for a sufficient portion of the fluid being extracted, hence the performance such as flow rate of a well is increased. The reservoir volumes close to seismic receivers are determined with improved accuracy, thus accounting for spatial variations in formation properties. By applying the method to each grid cell separately, the mathematical relationship and associated constants and coefficients are selected to fit the event data of the grid cell to more accurately predict the undetected events in that grid cell.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a non-transitory computer readable medium storing instructions for a method for estimating a volume of a stimulated reservoir.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart illustrating a method for estimating a volume of a stimulated reservoir.    Method for estimating parameter of subsurface volume (90)    Step for stimulating earth performance (91)    Step for receiving a seismic signal (92)    Step for estimating a number of microseismic events (93)    Step for establishing a stimulated reservoir volume (94)