Every magnitude 4.0+ earthquake globally since 2020 — ~101k events from USGS FDSN web service. Per quake: USGS event_id, magnitude + type (mb / mww / ml / mwc), place description, occurred_at (UTC), lat/lon, depth (km), tsunami flag, Did-You-Feel-It (DYFI) felt report count, max CDI (community intensity), max MMI (instrumental), USGS alert color (green/yellow/orange/red), significance score, network code (us / ci / ak / hv). Powers /earthquake/{event_id} canonical Event pages with sameAs to USGS event page.
Every record in this dataset can be traced back to its primary source at https://earthquake.usgs.gov/fdsnws/event/1/. Underlying content is a US federal government work (public domain under 17 USC §105); our derived data is licensed CC0 1.0.