class 4 - states
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MMTClass
Last edited Mar 3, 2017
Created on Mar 3, 2017
This visualization displays earthquakes recorded in the United States over the past week, color-coded by magnitude on a dark basemap of state boundaries. It uses D3.js v4 with the `d3.geoAlbersUsa` projection and `d3.geoPath` to render both the TopoJSON state outlines and GeoJSON earthquake points from the USGS real-time feed. The points are filtered into four magnitude bins and drawn with distinct colors, while a legend built with d3-legend explains the scale.
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