{"version":"1.0","type":"rich","title":"Earthquake Choropleth Map","description":"The Earthquake Choropleth Map visualizes the total number of earthquakes per U.S. state from 2010 to 2015, using a logarithmic color scale applied via `d3.scaleThreshold` and `d3.schemeOrRd`. The map renders U.S. states as SVG paths with `d3.geoPath` and an AlbersUSA projection, built from TopoJSON data. Hovering triggers a custom tooltip that displays state, region, and earthquake count, styled through CSS. The visualization uses D3 v5 to load CSV data and TopoJSON geometry.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/ca0601e42a6044358518f7c9f10a08da?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}