This choropleth map visualizes the total number of recorded earthquakes per U.S. state, using a logarithmic transformation of the raw counts to compress the data’s range. The map is rendered in SVG using d3.geoPath with a geoAlbersUsa projection, while a d3.scaleOrdinal maps logged earthquake values to a nine-step sequential color scheme from schemeOrRd. State boundaries are drawn from TopoJSON data, and each state includes a title tooltip displaying its name, region, and original earthquake count. A custom color legend component, built with reusable D3 selections, appears alongside the map.