This line chart visualizes earthquake statistics from 2000 to 2015, comparing the annual frequency of earthquakes across different magnitude ranges (5–5.9, 6–6.9, 7–7.9, and 8.0+) as four distinct colored lines. Built with D3 v5 and rendered as SVG, it uses `scaleTime` and `scaleLinear` for axes, `d3.line` with `curveBasis` for smooth paths, and `axisBottom`/`axisLeft` for gridlines. Data is loaded from a CSV via `d3.csv`, with the chart including a legend and axis labels.