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USGS FDSN Event API boundary

Official-source access, authentication, request-shaping, paging, freshness, legal, and interpretation boundaries for USGS FDSN Event API.

version 1.0.0freshness currentobserved 2026-08-28T05:32:38Z

resource.public-data.usgs-fdsn-event-api
sha256:c052eb56d0b42286a14e30de85b18a18c1a5e14eb309ad219c0b11f4067479f7

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Evidence-backed facts

  1. The USGS FDSN Event service exposes earthquake catalog queries, counts, catalog and contributor vocabularies, application metadata, and service version information. informative
  2. Public query access requires no account, but it grants no catalog-editing, alert-issuance, emergency-management, or authoritative interpretation permission. informative
  3. Clients must bind time, geographic, magnitude, depth, catalog, contributor, event, ordering, limit, offset, and output format and use real-time GeoJSON feeds for display workloads when advised. informative
  4. Event locations, magnitudes, products, and review status can change, and catalog results do not forecast earthquakes, establish local impact, replace ShakeAlert or hazard products, or provide safety instructions. informative