{"version":"1.0","type":"rich","title":"Untitled","description":"A stacked bar chart displays earthquake magnitudes across U.S. states for selectable years, with each bar segmented by magnitude range (7.0+, 6–6.9, 5–5.9) and annotated with the total count. Users choose a year from a dropdown menu, triggering a 750ms transition that updates bar positions, heights, and axis scales. The visualization uses D3 v5, leveraging `d3.csv` for data loading, `d3.stack` for layering, `d3.scaleBand` and `d3.scaleLinear` for axes, and SVG transitions to animate changes.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/4709f5f6874e40808469b6b23a466b1c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}