{"version":"1.0","type":"rich","title":"Earthquake Choropleth Map","description":"This choropleth map visualizes earthquake totals across U.S. states, using color intensity to show logarithmic counts in a sequential red scheme. The map renders geographic boundaries with `d3.geoPath` and the Albers USA projection, while state colors are assigned via a `d3.scaleThreshold` using `d3.schemeOrRd`. Data comes from a CSV of earthquake records and TopoJSON state geometries, processed using the `topojson.feature` API. Hovering a state highlights its border through CSS, though tooltip code is incomplete in the source.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/ff41ff7d652240128536fab8f012fa69?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}