A computer-implemented method of deducing properties of subsurface caverns through seismic information, the method being implemented in a computer system that includes one or more physical processors, the method comprising: obtaining seismic information derived from seismic data captured at or near a subsurface volume of interest that includes a cavern, wherein the cavern causes a diffraction pattern in the seismic information and is represented in the seismic information as a point diffractor; determining from the seismic information having the diffraction pattern a relationship of a cavern amplitude of the cavern in the seismic information to a background amplitude of the subsurface volume of interest in the seismic information at one or more locations that correspond to the position of the cavern, so as to normalize the cavern amplitude; obtaining property values of properties of the subsurface volume of interest at one or more locations that correspond to the position of the cavern; obtaining proposed property values of properties of the cavern that impact seismic measurements; obtaining a volume model of the subsurface volume of interest in which the subsurface volume of interest has the obtained property values around the cavity, and in which the cavern has the proposed property values; performing synthetic seismic analysis on the volume model to obtain synthetic seismic information; and analyzing (42, 44) the proposed property values to determine whether to accept them as being accurate by comparing a relationship of a model cavern amplitude of the cavern in the synthetic seismic information to a model background amplitude of the subsurface volume of interest in the synthetic seismic information, which normalizes the model cavern amplitude, with the relationship of the cavern amplitude to the background amplitude, wherein the cavern amplitude is the seismic amplitude present in the seismic information at the cavern location concerned and the background amplitude is the seismic amplitude present in the seismic information at locations surrounding the cavern, and wherein the model cavern amplitude and model background amplitude correspond respectively to the cavern amplitude and the background amplitude but are determined from the synthetic seismic information. obtaining seismic information derived from seismic data captured at or near a subsurface volume of interest that includes a cavern, wherein the cavern causes a diffraction pattern in the seismic information and is represented in the seismic information as a point diffractor; determining from the seismic information having the diffraction pattern a relationship of a cavern amplitude of the cavern in the seismic information to a background amplitude of the subsurface volume of interest in the seismic information at one or more locations that correspond to the position of the cavern, so as to normalize the cavern amplitude; obtaining property values of properties of the subsurface volume of interest at one or more locations that correspond to the position of the cavern; obtaining proposed property values of properties of the cavern that impact seismic measurements; obtaining a volume model of the subsurface volume of interest in which the subsurface volume of interest has the obtained property values around the cavity, and in which the cavern has the proposed property values; performing synthetic seismic analysis on the volume model to obtain synthetic seismic information; and analyzing (42, 44) the proposed property values to determine whether to accept them as being accurate by comparing a relationship of a model cavern amplitude of the cavern in the synthetic seismic information to a model background amplitude of the subsurface volume of interest in the synthetic seismic information, which normalizes the model cavern amplitude, with the relationship of the cavern amplitude to the background amplitude, wherein the cavern amplitude is the seismic amplitude present in the seismic information at the cavern location concerned and the background amplitude is the seismic amplitude present in the seismic information at locations surrounding the cavern, and wherein the model cavern amplitude and model background amplitude correspond respectively to the cavern amplitude and the background amplitude but are determined from the synthetic seismic information.