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{
  "description": "An active or historically active volcano with location, classification, and eruption history.",
  "properties": {
    "country": {
      "description": "Country where the volcano is located",
      "type": [
        "string",
        "null"
      ]
    },
    "elevation": {
      "description": "Summit elevation in meters",
      "type": [
        "number",
        "null"
      ]
    },
    "lastEruption": {
      "description": "Last known eruption year or period",
      "type": [
        "string",
        "null"
      ]
    },
    "latitude": {
      "description": "Latitude in decimal degrees",
      "type": [
        "number",
        "null"
      ]
    },
    "longitude": {
      "description": "Longitude in decimal degrees",
      "type": [
        "number",
        "null"
      ]
    },
    "name": {
      "description": "Volcano name",
      "type": "string"
    },
    "region": {
      "description": "Geographic region",
      "type": [
        "string",
        "null"
      ]
    },
    "rockTypes": {
      "description": "Dominant rock types",
      "items": {
        "type": "string"
      },
      "type": "array"
    },
    "status": {
      "description": "Activity status (e.g. Holocene, Historical, Pleistocene)",
      "type": [
        "string",
        "null"
      ]
    },
    "tectonicSetting": {
      "description": "Tectonic setting (e.g. Subduction zone, Rift zone, Intraplate)",
      "type": [
        "string",
        "null"
      ]
    },
    "type": {
      "description": "Primary volcano type (e.g. Stratovolcano, Shield, Caldera)",
      "type": [
        "string",
        "null"
      ]
    },
    "url": {
      "description": "URL to the GVP volcano page",
      "type": [
        "string",
        "null"
      ]
    },
    "volcanoNumber": {
      "description": "Smithsonian GVP volcano number",
      "type": "integer"
    }
  },
  "required": [
    "name",
    "volcanoNumber"
  ],
  "title": "Volcano",
  "type": "object"
}