This choropleth map uses the Albers USA projection to visualize the number of earthquakes per state in the United States, rendered as Scalable Vector Graphics (SVG) paths. The map employs a threshold color scale with a sequential color scheme (OrRd) to encode the logarithmically transformed earthquake counts for each state. The visualization is built using D3's `geoPath` and `geoAlbersUsa` for projection and map generation, with `topojson` for feature extraction. Data is loaded from external CSV and TopoJSON files. Hovering over a state turns it light green, revealing tooltips with the region, state name, and earthquake count.