This interactive bar chart displays the magnitudes of US earthquakes in 2021, with each bar labeled by its source location. It uses React to manage state and render the SVG, while d3’s `csv` loader fetches the remote dataset, and `scaleBand` and `scaleLinear` map the categorical locations and numeric magnitudes to the plot’s axes. Gridlines are drawn with d3’s `scaleLinear.ticks`, and bars are simple SVG `rect` elements.