This example visualizes earthquake locations using a global map rendered with D3’s `d3.geoPath` and `d3.geoOrthographic` projections. It plots seismic events as circles whose size and color encode magnitude, with a color scale from `d3.scaleSequential`. The visualization updates over time by cycling through timestamped data, using `d3.transition` to animate circle radius changes. It relies on the TopoJSON world atlas for geographic boundaries and fetches earthquake data from a local CSV file.