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Forward wavefield simulation is an important step in Full Waveform Inversionsystems. Fast simulations are instrumental to get inversion result inreasonable time frames. Most of research and software aims towards utilizingcostly computer clusters composed of multiple CPUs and numerous high end GPUsto shorten the forward simulation time. Using this type of hardware has somedisadvantages as: high cost, complex programming models and unavailability ofresources. In this work, we present a finite difference elastic 3D wavefieldforward simulation that takes advantage of any modern low end GPU, by using theGLSL shading language.Some of the advantages of using GLSL are: runs in anymodern GPU, has a simplified computing and memory model and provides state ofart performance thanks to its very well optimized vendor developed drivers. Weshow that our GLSL implementation easily outperforms a multicore CPUimplementation in a modern PC. We further benchmark our result using a realseismic event, and show that we can get accurate simulations in reasonable timeusing our system.

Elastic 3D Wavefield Simulation on budget GPUs using the GLSL shading language