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.
The listed URL identifies a referenced source; it does not by itself document the ingestion endpoint. Referenced source URL: https://earthquake.usgs.gov/fdsnws/event/1/. Source-specific terms apply. US federal employee-authored works are generally public domain under 17 USC 105; non-federal and third-party material retains source terms. Free or keyless access does not alter source terms. Metadata and normalization authored by MORVS (AI Analytics LLC) are CC0 only where expressly stated.