This example visualizes the propagation of seismic waves across a global map, using a particle system to represent the expanding shockwave from an earthquake epicenter. The view combines a geographic basemap with hundreds of animated particles that move outward and fade over time. The visualization is built with d3.js, specifically using the `d3.forceSimulation` and `d3.geoPath` APIs to handle particle physics and map projection. The code reads earthquake data from the USGS live feed and renders the scene on an HTML5 Canvas, with particle attributes updated in each animation frame.