{"version":"1.0","type":"rich","title":"C — USGS Earthquakes (Loader)","description":"This example loads earthquake data from the USGS GeoJSON feed, fetching the M2.5+ 30-day summary directly via URL to avoid file upload limits. The code parses each feature’s time, magnitude, depth, coordinates, and place name into structured rows, then displays a count and a JSON preview of the first six records. It uses the Fetch API with `d3.json`-compatible `fetch().then(r => r.json())` and renders a proof-of-life layout with innerHTML, demonstrating data ingestion without any visualization yet.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/05a5a94131a64b42b3b41720fe172e47?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}