{
  "source": "USGS FDSN Earthquake Catalog count endpoint",
  "retrievedAt": "2026-09-24T20:57:12.377365+00:00",
  "periodStart": "2001-09-24T00:00:00Z",
  "periodEnd": "2026-09-23T23:59:59.999Z",
  "note": "Saved response, not a live count. USGS may revise the catalog. Event type earthquake; coordinate radius is epicentral distance.",
  "examples": [
    {
      "id": "cordoba",
      "latitude": 37.8846,
      "longitude": -4.7794,
      "radiusKm": 100,
      "minMagnitude": 4.5,
      "count": 0,
      "observationYears": 25,
      "horizonYears": 10,
      "queryUrl": "https://earthquake.usgs.gov/fdsnws/event/1/count?latitude=37.8846&longitude=-4.7794&maxradiuskm=100&minmagnitude=4.5&starttime=2001-09-24T00%3A00%3A00&endtime=2026-09-23T23%3A59%3A59.999&eventtype=earthquake",
      "queryParameters": {
        "latitude": 37.8846,
        "longitude": -4.7794,
        "maxradiuskm": 100,
        "minmagnitude": 4.5,
        "starttime": "2001-09-24T00:00:00",
        "endtime": "2026-09-23T23:59:59.999",
        "eventtype": "earthquake"
      }
    },
    {
      "id": "tokyo",
      "latitude": 35.6762,
      "longitude": 139.6503,
      "radiusKm": 100,
      "minMagnitude": 4.5,
      "count": 517,
      "observationYears": 25,
      "horizonYears": 10,
      "queryUrl": "https://earthquake.usgs.gov/fdsnws/event/1/count?latitude=35.6762&longitude=139.6503&maxradiuskm=100&minmagnitude=4.5&starttime=2001-09-24T00%3A00%3A00&endtime=2026-09-23T23%3A59%3A59.999&eventtype=earthquake",
      "queryParameters": {
        "latitude": 35.6762,
        "longitude": 139.6503,
        "maxradiuskm": 100,
        "minmagnitude": 4.5,
        "starttime": "2001-09-24T00:00:00",
        "endtime": "2026-09-23T23:59:59.999",
        "eventtype": "earthquake"
      }
    },
    {
      "id": "tokyo-50km",
      "latitude": 35.6762,
      "longitude": 139.6503,
      "radiusKm": 50,
      "minMagnitude": 4.5,
      "count": 186,
      "observationYears": 25,
      "horizonYears": 10,
      "queryUrl": "https://earthquake.usgs.gov/fdsnws/event/1/count?latitude=35.6762&longitude=139.6503&maxradiuskm=50&minmagnitude=4.5&starttime=2001-09-24T00%3A00%3A00&endtime=2026-09-23T23%3A59%3A59.999&eventtype=earthquake",
      "queryParameters": {
        "latitude": 35.6762,
        "longitude": 139.6503,
        "maxradiuskm": 50,
        "minmagnitude": 4.5,
        "starttime": "2001-09-24T00:00:00",
        "endtime": "2026-09-23T23:59:59.999",
        "eventtype": "earthquake"
      }
    },
    {
      "id": "quito",
      "latitude": -0.1807,
      "longitude": -78.4678,
      "radiusKm": 100,
      "minMagnitude": 4.5,
      "count": 33,
      "observationYears": 25,
      "horizonYears": 10,
      "queryUrl": "https://earthquake.usgs.gov/fdsnws/event/1/count?latitude=-0.1807&longitude=-78.4678&maxradiuskm=100&minmagnitude=4.5&starttime=2001-09-24T00%3A00%3A00&endtime=2026-09-23T23%3A59%3A59.999&eventtype=earthquake",
      "queryParameters": {
        "latitude": -0.1807,
        "longitude": -78.4678,
        "maxradiuskm": 100,
        "minmagnitude": 4.5,
        "starttime": "2001-09-24T00:00:00",
        "endtime": "2026-09-23T23:59:59.999",
        "eventtype": "earthquake"
      }
    }
  ]
}