{"version":"1.0","type":"rich","title":"Untitled","description":"A drop-down menu switches between two years of earthquake magnitude data, displaying stacked totals for seven U.S. states across three magnitude bands (7.0+, 6–6.9, 5–5.9) as colored segments. The chart uses D3 v5’s `d3.csv`, `d3.stack`, `d3.scaleBand`, `d3.scaleLinear`, and `d3.scaleOrdinal`, with SVG rectangles and text labels updated via `transition`. Segments animate smoothly to new heights and totals when the year changes, rendering the raw CSV counts as proportional bars.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/95d9a2c153e84f4098164642ffec50d8?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}