{"version":"1.0","type":"rich","title":"Untitled","description":"This interactive stacked bar chart visualizes earthquake counts by magnitude range across U.S. states for selected years. A dropdown menu lets viewers switch between 2017 and 2018 data, triggering a 750ms transition that updates bar positions and total labels. Built with D3 v5, the chart uses `d3.stack()` and `d3.scaleBand()`, rendering SVG rects and text elements. Color encoding distinguishes three magnitude categories (7.0+, 6–6.9, 5–5.9), with data loaded from a CSV file via `d3.csv`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/690549b9d09a402f96dedc5ea828a984?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}