{
  "summary": "This chapter is observing (no good/bad criterion): observation started 2026-08-30, 3 series, latest confirmed 2026-09-23. Latest final value: active tropical cyclones, TS or stronger 2 (2026-09-23). (Source: USGS; NOAA NHC; NOAA NWS / updated 2026-09-24 18:01 JST)",
  "cite_as": "AI Lifeline, Climate & disasters (United States edition), data confirmed 2026-09-23, https://ai-lifeline.org/us/disaster/",
  "cannot_say": [
    "What damage, casualties or facility impacts any event caused (counts only).",
    "Whether a hurricane, earthquake or heat wave will occur (no forecasts).",
    "Wildfire activity (a candidate until the NIFC licence is verified), or how U.S. hazard levels compare with Japan or the EU (different scales and profiles)."
  ],
  "generated": "2026-09-24 18:01",
  "region": "us",
  "candidates": [
    {
      "status": "candidate_unobserved",
      "name": "Wildfire (NIFC — large incidents / acres burned)",
      "reason": "Endpoint reachable; open-data licence text not yet verified. Added to the profile once verified."
    }
  ],
  "series": {
    "hurricane": {
      "daily": [
        {
          "date": "2026-08-29",
          "value": 2,
          "fetched_at": "2026-08-30 00:17"
        },
        {
          "date": "2026-08-30",
          "value": 2,
          "fetched_at": "2026-08-30 18:00"
        },
        {
          "date": "2026-08-31",
          "value": 2,
          "fetched_at": "2026-08-31 18:00"
        },
        {
          "date": "2026-09-01",
          "value": 4,
          "fetched_at": "2026-09-01 18:01"
        },
        {
          "date": "2026-09-02",
          "value": 3,
          "fetched_at": "2026-09-02 18:01"
        },
        {
          "date": "2026-09-03",
          "value": 3,
          "fetched_at": "2026-09-04 08:46"
        },
        {
          "date": "2026-09-04",
          "value": 3,
          "fetched_at": "2026-09-04 18:01"
        },
        {
          "date": "2026-09-05",
          "value": 3,
          "fetched_at": "2026-09-05 18:00"
        },
        {
          "date": "2026-09-06",
          "value": 3,
          "fetched_at": "2026-09-06 18:00"
        },
        {
          "date": "2026-09-07",
          "value": 2,
          "fetched_at": "2026-09-07 18:00"
        },
        {
          "date": "2026-09-08",
          "value": 2,
          "fetched_at": "2026-09-08 18:33"
        },
        {
          "date": "2026-09-09",
          "value": 1,
          "fetched_at": "2026-09-09 18:01"
        },
        {
          "date": "2026-09-10",
          "value": 1,
          "fetched_at": "2026-09-10 18:01"
        },
        {
          "date": "2026-09-11",
          "value": 1,
          "fetched_at": "2026-09-11 18:00"
        },
        {
          "date": "2026-09-12",
          "value": 1,
          "fetched_at": "2026-09-12 18:00"
        },
        {
          "date": "2026-09-13",
          "value": 1,
          "fetched_at": "2026-09-13 18:01"
        },
        {
          "date": "2026-09-14",
          "value": 1,
          "fetched_at": "2026-09-14 18:01"
        },
        {
          "date": "2026-09-15",
          "value": 0,
          "fetched_at": "2026-09-15 18:01"
        },
        {
          "date": "2026-09-16",
          "value": 0,
          "fetched_at": "2026-09-16 18:00"
        },
        {
          "date": "2026-09-17",
          "value": 0,
          "fetched_at": "2026-09-17 18:00"
        },
        {
          "date": "2026-09-18",
          "value": 0,
          "fetched_at": "2026-09-18 18:01"
        },
        {
          "date": "2026-09-19",
          "value": 0,
          "fetched_at": "2026-09-19 18:35"
        },
        {
          "date": "2026-09-20",
          "value": 2,
          "fetched_at": "2026-09-20 18:01"
        },
        {
          "date": "2026-09-21",
          "value": 3,
          "fetched_at": "2026-09-21 18:01"
        },
        {
          "date": "2026-09-22",
          "value": 3,
          "fetched_at": "2026-09-22 18:00"
        },
        {
          "date": "2026-09-23",
          "value": 2,
          "fetched_at": "2026-09-23 18:01"
        }
      ],
      "name": "Active tropical cyclones, TS or stronger (NHC, Atlantic + East/Central Pacific; daily snapshot)",
      "today_provisional": {
        "date": "2026-09-24",
        "value": 4,
        "as_of": "2026-09-24 18:01",
        "note": "provisional (partial day, as of retrieval time)"
      },
      "source": {
        "name": "NOAA National Hurricane Center",
        "license": "Public domain (U.S. federal government work). No key.",
        "url": "https://www.nhc.noaa.gov/"
      }
    },
    "earthquake": {
      "definition_note": "Bounding box lat 18-72, lon -180 to -66 (covers CONUS, Alaska east of the antimeridian, Hawaii; includes some adjacent territory — labelled \"U.S. vicinity\").",
      "name": "Earthquakes M5.0+ per day (UTC; U.S. vicinity bounding box — see definition)",
      "source": {
        "name": "U.S. Geological Survey, Earthquake Hazards Program",
        "license": "Public domain (U.S. federal government work). No key.",
        "url": "https://earthquake.usgs.gov/fdsnws/event/1/"
      },
      "daily": [
        {
          "date": "2026-08-26",
          "value": 0,
          "fetched_at": "2026-08-30 00:17"
        },
        {
          "date": "2026-08-27",
          "value": 0,
          "fetched_at": "2026-08-30 18:00"
        },
        {
          "date": "2026-08-28",
          "value": 0,
          "fetched_at": "2026-08-31 18:00"
        },
        {
          "date": "2026-08-29",
          "value": 0,
          "fetched_at": "2026-09-01 18:01"
        },
        {
          "date": "2026-08-30",
          "value": 0,
          "fetched_at": "2026-09-02 18:00"
        },
        {
          "date": "2026-08-31",
          "value": 0,
          "fetched_at": "2026-09-04 08:46"
        },
        {
          "date": "2026-09-01",
          "value": 1,
          "fetched_at": "2026-09-04 18:01"
        },
        {
          "date": "2026-09-02",
          "value": 2,
          "fetched_at": "2026-09-05 18:00"
        },
        {
          "date": "2026-09-03",
          "value": 5,
          "fetched_at": "2026-09-06 18:00"
        },
        {
          "date": "2026-09-04",
          "value": 0,
          "fetched_at": "2026-09-07 18:00"
        },
        {
          "date": "2026-09-05",
          "value": 0,
          "fetched_at": "2026-09-08 18:33"
        },
        {
          "date": "2026-09-06",
          "value": 0,
          "fetched_at": "2026-09-09 18:01"
        },
        {
          "date": "2026-09-07",
          "value": 1,
          "fetched_at": "2026-09-10 18:00"
        },
        {
          "date": "2026-09-08",
          "value": 0,
          "fetched_at": "2026-09-11 18:00"
        },
        {
          "date": "2026-09-09",
          "value": 0,
          "fetched_at": "2026-09-12 18:00"
        },
        {
          "date": "2026-09-10",
          "value": 0,
          "fetched_at": "2026-09-13 18:00"
        },
        {
          "date": "2026-09-11",
          "value": 1,
          "fetched_at": "2026-09-14 18:01"
        },
        {
          "date": "2026-09-12",
          "value": 0,
          "fetched_at": "2026-09-15 18:01"
        },
        {
          "date": "2026-09-13",
          "value": 0,
          "fetched_at": "2026-09-16 18:00"
        },
        {
          "date": "2026-09-14",
          "value": 0,
          "fetched_at": "2026-09-17 18:00"
        },
        {
          "date": "2026-09-15",
          "value": 0,
          "fetched_at": "2026-09-18 18:01"
        },
        {
          "date": "2026-09-16",
          "value": 0,
          "fetched_at": "2026-09-19 18:35"
        },
        {
          "date": "2026-09-17",
          "value": 1,
          "fetched_at": "2026-09-20 18:01"
        },
        {
          "date": "2026-09-18",
          "value": 0,
          "fetched_at": "2026-09-21 18:01"
        },
        {
          "date": "2026-09-19",
          "value": 0,
          "fetched_at": "2026-09-22 18:00"
        },
        {
          "date": "2026-09-20",
          "value": 1,
          "fetched_at": "2026-09-23 18:00"
        },
        {
          "date": "2026-09-21",
          "value": 0,
          "fetched_at": "2026-09-24 18:01"
        },
        {
          "date": "2026-09-22",
          "value": 0,
          "fetched_at": "2026-09-24 18:01"
        },
        {
          "date": "2026-09-23",
          "value": 0,
          "fetched_at": "2026-09-24 18:01"
        }
      ]
    },
    "extreme_heat": {
      "daily": [
        {
          "date": "2026-08-29",
          "value": 6,
          "fetched_at": "2026-08-30 00:17"
        },
        {
          "date": "2026-08-30",
          "value": 3,
          "fetched_at": "2026-08-30 18:00"
        },
        {
          "date": "2026-08-31",
          "value": 16,
          "fetched_at": "2026-08-31 18:00"
        },
        {
          "date": "2026-09-01",
          "value": 28,
          "fetched_at": "2026-09-01 18:01"
        },
        {
          "date": "2026-09-02",
          "value": 54,
          "fetched_at": "2026-09-02 18:01"
        },
        {
          "date": "2026-09-03",
          "value": 61,
          "fetched_at": "2026-09-04 08:46"
        },
        {
          "date": "2026-09-04",
          "value": 49,
          "fetched_at": "2026-09-04 18:01"
        },
        {
          "date": "2026-09-05",
          "value": 34,
          "fetched_at": "2026-09-05 18:01"
        },
        {
          "date": "2026-09-06",
          "value": 20,
          "fetched_at": "2026-09-06 18:00"
        },
        {
          "date": "2026-09-07",
          "value": 13,
          "fetched_at": "2026-09-07 18:00"
        },
        {
          "date": "2026-09-08",
          "value": 30,
          "fetched_at": "2026-09-08 18:33"
        },
        {
          "date": "2026-09-09",
          "value": 29,
          "fetched_at": "2026-09-09 18:01"
        },
        {
          "date": "2026-09-10",
          "value": 6,
          "fetched_at": "2026-09-10 18:01"
        },
        {
          "date": "2026-09-11",
          "value": 5,
          "fetched_at": "2026-09-11 18:00"
        },
        {
          "date": "2026-09-12",
          "value": 12,
          "fetched_at": "2026-09-12 18:00"
        },
        {
          "date": "2026-09-13",
          "value": 12,
          "fetched_at": "2026-09-13 18:01"
        },
        {
          "date": "2026-09-14",
          "value": 20,
          "fetched_at": "2026-09-14 18:01"
        },
        {
          "date": "2026-09-15",
          "value": 21,
          "fetched_at": "2026-09-15 18:01"
        },
        {
          "date": "2026-09-16",
          "value": 17,
          "fetched_at": "2026-09-16 18:00"
        },
        {
          "date": "2026-09-17",
          "value": 14,
          "fetched_at": "2026-09-17 18:00"
        },
        {
          "date": "2026-09-18",
          "value": 9,
          "fetched_at": "2026-09-18 18:01"
        },
        {
          "date": "2026-09-19",
          "value": 12,
          "fetched_at": "2026-09-19 18:35"
        },
        {
          "date": "2026-09-20",
          "value": 4,
          "fetched_at": "2026-09-20 18:01"
        },
        {
          "date": "2026-09-21",
          "value": 1,
          "fetched_at": "2026-09-21 18:01"
        },
        {
          "date": "2026-09-22",
          "value": 0,
          "fetched_at": "2026-09-22 18:01"
        },
        {
          "date": "2026-09-23",
          "value": 0,
          "fetched_at": "2026-09-23 18:01"
        }
      ],
      "name": "Active heat alerts (Excessive Heat Warning + Heat Advisory; daily snapshot)",
      "today_provisional": {
        "date": "2026-09-24",
        "value": 0,
        "as_of": "2026-09-24 18:01",
        "note": "provisional (partial day, as of retrieval time)"
      },
      "source": {
        "name": "NOAA National Weather Service alerts API",
        "license": "Public domain (U.S. federal government work). No key (User-Agent明示のみ)",
        "url": "https://www.weather.gov/documentation/services-web-api"
      }
    }
  },
  "disaster_profile": [
    "earthquake",
    "hurricane",
    "extreme_heat"
  ],
  "profile_note": "Only hazards in this region's profile are shown. Seismic scales differ across countries; no cross-country comparison.",
  "status": "observing",
  "can_say": [
    "How many M5.0+ earthquakes USGS recorded per UTC day inside the stated U.S.-vicinity bounding box.",
    "How many tropical cyclones of tropical-storm strength or stronger the NHC listed as active each day (Atlantic and East/Central Pacific), and how many Excessive Heat Warnings and Heat Advisories were active (daily snapshots).",
    "Which days recorded zero events as opposed to days not yet measured, and which same-day values are still provisional."
  ],
  "status_note": "Observing only: mechanical event counts (no damages, no casualties). A zero means zero events; missing means not yet measured. Same-day values are provisional until the next day's recount.",
  "answer_line": "This chapter is observing (no good/bad criterion): observation started 2026-08-30, 3 series, latest confirmed 2026-09-23. Latest final value: active tropical cyclones, TS or stronger 2 (2026-09-23). (Source: USGS; NOAA NHC; NOAA NWS / updated 2026-09-24 18:01 JST)",
  "answer_line_date": "2026-09-23",
  "answer_kind": "observing",
  "headline_answer": {
    "series": "hurricane",
    "label": "active tropical cyclones, TS or stronger",
    "value": 2,
    "unit": "",
    "date": "2026-09-23",
    "threshold": null
  },
  "faq": [
    {
      "q": "How many M5+ earthquakes, active tropical cyclones and heat alerts were counted on the latest confirmed day?",
      "a": "2026-09-23: earthquakes M5.0+ in the stated U.S. vicinity bounding box 0 (USGS, UTC day); active tropical cyclones TS or stronger 2 (NOAA NHC, Atlantic + East/Central Pacific); active heat alerts 0 (NOAA NWS). Zero means zero events."
    },
    {
      "q": "Are damages or casualties included?",
      "a": "No. Only mechanical event counts are recorded (definition docs/指標定義_第8章_気候災害.md v1.0, fixed 2026-08-30). Same-day values are provisional until the next day's recount; wildfire is a candidate until its licence is verified."
    },
    {
      "q": "What is the source and how often is it updated?",
      "a": "USGS, NHC and NWS feeds retrieved daily at 18:00 JST (observation started 2026-08-30). Last updated 2026-09-24 18:01 JST. Machine-readable: https://ai-lifeline.org/us/api/disaster_us.json"
    },
    {
      "q": "What can this data not tell you?",
      "a": "What this chapter cannot say (ledger v1.0, approved 2026-09-05; full text in the method section): What damage, casualties or facility impacts any event caused (counts only); Whether a hurricane, earthquake or heat wave will occur (no forecasts); Wildfire activity (a candidate until the NIFC licence is verified), or how U.S. hazard levels compare with Japan or the EU (different scales and profiles)."
    }
  ],
  "citation": {
    "page": "https://ai-lifeline.org/us/disaster/",
    "api": "https://ai-lifeline.org/us/api/disaster_us.json",
    "last_confirmed": "2026-09-23",
    "next_expected": "2026-09-24",
    "generated": "2026-09-24 18:01",
    "observation_start": "2026-08-30",
    "series_count": 3,
    "series_not_yet_measured": 0,
    "title_short": "active cyclones 2 (final 9/23)",
    "generated_by": "scripts/citation/apply_citation_layer.py",
    "ledger_version": "v1.1-2026-09-06",
    "keys_written": [
      "summary",
      "cite_as",
      "answer_line",
      "answer_line_date",
      "answer_kind",
      "headline_answer",
      "faq",
      "citation"
    ]
  }
}