Overview GMSimViz is an automation tool that produces an animated 3D visualization of geological faults, ground motion and other earthquake-related data. Typically verification of ground motion simulations involves various data visualization methods, and a 3D animation is an excellent medium to understand the nature of an earthquake. It also helps to communicate with the general public, but its production has been largely left to time-consuming manual interaction with no existing automation tool available. GMSimViz was created to fulfil this need and produces a quality 3D animation directly from the simulation data in a fully automated way. GMSimViz is published on GitHub under MIT license. A video of the result of GMSimViz is also available on Youtube(please see '5. External Sources' at the bottom for URLs and QR codes).