1. A method comprising: processing data representative of acoustic model parameters in a processor-based machine to simulate seismic wave propagation in a first simulation based on an acoustic model; based on a result of the first simulation, estimating an error between the result and another result obtained if the seismic wave propagation were simulated in a second simulation based on an elastic model; and predicting the result obtained with the second simulation without performing the second simulation, based at least in part on the estimated error.