This bubble chart maps earthquake locations using longitude and latitude coordinates, with each steelblue circle representing a seismic event. The visualization plots raw geographic data points without magnitude encoding, emphasizing spatial distribution over intensity. The code uses D3 v7’s `d3.csv` for data loading and `d3.scaleLinear` with `d3.axisBottom` and `d3.axisLeft` to construct axes. SVG circles are positioned via the `xScale` and `yScale` functions, rendering the dataset from the provided external CSV file into an 800×600 pixel chart.