This choropleth map visualizes the number of earthquakes recorded in U.S. states, using a logarithmic color scale to represent data from a CSV dataset of state earthquake counts. The map renders U.S. state boundaries via `d3.geoPath` with a `d3.geoAlbersUsa` projection, using TopoJSON data for the geographic shapes and `d3.scaleThreshold` with the `d3.schemeOrRd` color scheme. Hover interactions are implemented through a d3-tip tooltip, while state styling changes on mouseover through CSS-based `:hover` rules.