{"version":"1.0","type":"rich","title":"Earthquake Choropleth Map","description":"This choropleth map visualizes the total number of earthquakes for each U.S. state, using a logarithmic color scale to differentiate magnitudes. The map renders state boundaries from a TopoJSON file, and the color of each state is determined by its earthquake count, with a threshold-based color scale (`d3.scaleThreshold`) and a sequential color scheme (`d3.schemeOrRd`). The visualization uses D3 v5's geographic projection (`d3.geoAlbersUsa`) and `d3.geoPath` for drawing, while an interactive tooltip (`d3.tip`) displays the state name, region, and exact earthquake count on hover, with data sourced from a CSV file.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/c412b9d7ca164b8b9c8dddcc7dac8dd3?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}