{
  "schema": "kallipolis.resource-quality.v1",
  "id": "resource.public-data.usgs-earthquake-catalog-api",
  "version": "1.0.0",
  "title": "USGS Earthquake Catalog API boundary",
  "summary": "Official-source access, authentication, request-shaping, paging, freshness, legal, and interpretation boundaries for USGS Earthquake Catalog API.",
  "content": {
    "kind": "public-data-api-boundary",
    "facts": [
      {
        "id": "fact.usgs.earthquake-api.access",
        "statement": "The USGS FDSN Event Web Service supports catalog discovery, counts, version checks, and filtered earthquake queries in several formats.",
        "normativeLevel": "informative",
        "sourceIds": [
          "source.usgs.earthquake-api"
        ]
      },
      {
        "id": "fact.usgs.earthquake-api.authentication",
        "statement": "Catalog queries are limited to 20,000 events and should use count, time, magnitude, geography, ordering, limit, and offset deliberately.",
        "normativeLevel": "informative",
        "sourceIds": [
          "source.usgs.earthquake-api"
        ]
      },
      {
        "id": "fact.usgs.earthquake-api.request",
        "statement": "USGS recommends real-time GeoJSON feeds instead of repeated catalog searches for display applications that need current earthquake information.",
        "normativeLevel": "informative",
        "sourceIds": [
          "source.usgs.earthquake-api"
        ]
      },
      {
        "id": "fact.usgs.earthquake-api.boundary",
        "statement": "Preferred catalog values and event parameters can be updated, so a response is not immutable seismic truth or a substitute for official hazard guidance.",
        "normativeLevel": "informative",
        "sourceIds": [
          "source.usgs.earthquake-api"
        ]
      }
    ]
  },
  "language": "en",
  "category": "public-data-api",
  "state": "prepared",
  "canonicalUrl": "https://platoskallipolis.com/resources/public-data-apis/usgs-earthquake-catalog-api.json",
  "contentHash": "sha256:3f7ee2988a39715bb4d6ff95949d80c21dfa22d45247cc2fdf430eaa9281934d",
  "owner": {
    "id": "platos-kallipolis",
    "name": "Plato's Kallipolis",
    "type": "organization",
    "accountabilityUrl": "https://platoskallipolis.com/about"
  },
  "access": {
    "mode": "public",
    "url": "https://platoskallipolis.com/resources/public-data-apis/usgs-earthquake-catalog-api.json",
    "authentication": "none",
    "robotsAllowed": true
  },
  "provenance": {
    "method": "primary-source",
    "sources": [
      {
        "id": "source.usgs.earthquake-api",
        "url": "https://earthquake.usgs.gov/fdsnws/event/1/",
        "title": "Earthquake Catalog API Documentation",
        "publisher": "U.S. Geological Survey",
        "observedAt": "2026-08-27T08:40:00Z"
      }
    ]
  },
  "observedAt": "2026-08-27T08:40:00Z",
  "freshness": {
    "policy": "max-age",
    "state": "current",
    "nextReviewAt": "2026-09-03T08:40:00Z",
    "maxAgeSeconds": 604800
  },
  "license": {
    "id": "source-terms-apply",
    "url": "https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits",
    "redistributionAllowed": false
  },
  "evidence": [
    {
      "id": "evidence.usgs.earthquake-api",
      "type": "source-claim",
      "url": "https://earthquake.usgs.gov/fdsnws/event/1/",
      "observedAt": "2026-08-27T08:40:00Z"
    }
  ]
}