{
  "schema_version": "1.0",
  "base_protocol": "v0.18-federated-station-development.json",
  "suite_id": "cascadewatch-0.19-independent-river-blocking-holdout-2026-08-31",
  "created_at": "2026-08-30T17:48:32Z",
  "detector_git_commit": "6038f7ad60b3611796e69062332ad13b13258e32",
  "evaluator_git_commit": "6038f7ad60b3611796e69062332ad13b13258e32",
  "evaluation_role": "external_holdout",
  "frozen_before_waveform_access": true,
  "development_data_previously_opened": false,
  "waveform_bytes_accessed_before_protocol": false,
  "detector_outputs_inspected_before_protocol": false,
  "detector_parameters_changed_after_prior_freeze": false,
  "source_data": {
    "station_selection": "For each event, query a frozen public FDSN channel registry and choose the nearest six unique active vertical stations within 180 km using source geometry and sample rate only. No waveform values, event picks, signal-to-noise measurements, plots, or detector outputs participate in event or roster selection.",
    "station_metadata_snapshots": [
      {
        "event_id": "xinmo-2017",
        "file": "benchmark/station-metadata/xinmo-2017-earthscope-active-bhz-hhz.txt",
        "sha256": "c11d7b711c7ec928f3ec9e42beea17fd59c030c108b43ca639d3b0f1b8373381",
        "query_url": "https://service.earthscope.org/fdsnws/station/1/query?format=text&level=channel&starttime=2017-06-23T20%3A50%3A00Z&endtime=2017-06-23T23%3A20%3A00Z&latitude=32.0793&longitude=103.6637&maxradius=1.7&channel=BHZ%2CHHZ",
        "dataselect_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
      },
      {
        "event_id": "west-salt-creek-2014",
        "file": "benchmark/station-metadata/west-salt-creek-2014-earthscope-active-bhz-hhz.txt",
        "sha256": "8785bae54e9a451e4a5f66d52e6ad52a6171499f72dd22b001c982e2ac8969b8",
        "query_url": "https://service.earthscope.org/fdsnws/station/1/query?format=text&level=channel&starttime=2014-05-25T22%3A50%3A00Z&endtime=2014-05-26T01%3A20%3A00Z&latitude=39.164951&longitude=-107.8469&maxradius=1.5&channel=BHZ%2CHHZ",
        "dataselect_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
      }
    ],
    "event_metadata_snapshots": [
      {
        "event_id": "xinmo-2017",
        "file": "benchmark/event-metadata/xinmo-2017-independent-label.json",
        "sha256": "b23473b4373b8fc1029015a09cf5dabdf5450969c75e7309a3720cf01c0a42fa",
        "source_url": "https://doi.org/10.1007/s10346-018-1073-2"
      },
      {
        "event_id": "west-salt-creek-2014",
        "file": "benchmark/event-metadata/west-salt-creek-2014-independent-label.json",
        "sha256": "a4f8b63694932c35faba067404914e63b5b0285af5b20aa10bebe7e180a83607",
        "source_url": "https://www.usgs.gov/programs/landslide-hazards/science/reconstruction-avalanche-west-salt-creek-rock-avalanche"
      }
    ],
    "station_availability_snapshots": [],
    "reused_acquisition": null,
    "data_role": "Xinmo and West Salt Creek are independent external holdouts. Their public event labels and registry-only station rosters were checksummed and this protocol was committed before any holdout waveform bytes, plots, event-station picks, or detector outputs were accessed. The model artifact and strict two-second envelope-coherence decision policy are byte-for-byte unchanged from v0.18."
  },
  "events": [
    {
      "id": "xinmo-2017",
      "name": "Xinmo rockslide-debris avalanche",
      "mechanism": "rain-weakened rockslide and entrained debris avalanche",
      "cascade_consequence": "The approximately 13 million cubic metre mass movement crossed Xinmo village and blocked more than one kilometre of the Songping River.",
      "source_zone": {
        "latitude": 32.0793,
        "longitude": 103.6637,
        "radius_km": 8
      },
      "target_interval": {
        "start_at": "2017-06-23T21:39:16Z",
        "end_at": "2017-06-23T21:42:16.500000Z",
        "basis": "USGS global landslide seismic catalog event 273 origin plus its 180.5-second manually picked high-frequency duration; the catalog coordinate is excluded and the independently sourced Xinmo coordinate is pinned separately."
      },
      "waveform_window": {
        "start_at": "2017-06-23T20:50:00Z",
        "end_at": "2017-06-23T23:20:00Z"
      },
      "matched_control_dates": [
        "2017-06-16",
        "2017-06-17",
        "2017-06-18",
        "2017-06-19",
        "2017-06-20",
        "2017-06-21",
        "2017-06-22"
      ],
      "roster_policy": {
        "maximum_distance_km": 180
      },
      "stations": [
        {
          "id": "3J.BWLZ",
          "network": "3J",
          "station": "BWLZ",
          "location": "01",
          "channel": "BHZ",
          "latitude": 31.02935,
          "longitude": 103.17649,
          "distance_to_source_km": 125.545,
          "provider_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
        },
        {
          "id": "3J.BTLG",
          "network": "3J",
          "station": "BTLG",
          "location": "01",
          "channel": "BHZ",
          "latitude": 30.93672,
          "longitude": 103.50188,
          "distance_to_source_km": 127.972,
          "provider_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
        },
        {
          "id": "3J.BCPC",
          "network": "3J",
          "station": "BCPC",
          "location": "01",
          "channel": "BHZ",
          "latitude": 30.94832,
          "longitude": 103.31643,
          "distance_to_source_km": 129.996,
          "provider_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
        },
        {
          "id": "CB.CD2",
          "network": "CB",
          "station": "CD2",
          "location": "00",
          "channel": "BHZ",
          "latitude": 30.91,
          "longitude": 103.757797,
          "distance_to_source_km": 130.326,
          "provider_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
        },
        {
          "id": "3J.BRLZ",
          "network": "3J",
          "station": "BRLZ",
          "location": "01",
          "channel": "BHZ",
          "latitude": 30.99886,
          "longitude": 102.79512,
          "distance_to_source_km": 145.633,
          "provider_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
        },
        {
          "id": "3J.BWQC",
          "network": "3J",
          "station": "BWQC",
          "location": "01",
          "channel": "BHZ",
          "latitude": 30.76124,
          "longitude": 103.6629,
          "distance_to_source_km": 146.562,
          "provider_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
        }
      ],
      "sources": [
        {
          "supports": "source coordinate, source interval, volume, river blockage, and catalog-coordinate exclusion",
          "url": "benchmark/event-metadata/xinmo-2017-independent-label.json"
        },
        {
          "supports": "independent source location, mass-movement mechanism, river blockage, and dam extent",
          "url": "https://doi.org/10.1007/s10346-018-1073-2"
        }
      ]
    },
    {
      "id": "west-salt-creek-2014",
      "name": "West Salt Creek rock avalanche",
      "mechanism": "large rock slide that transformed into a long-runout rock avalanche",
      "cascade_consequence": "The approximately 54.5 million cubic metre avalanche disrupted West Salt Creek and left a temporary lake impounded behind the remaining slide block.",
      "source_zone": {
        "latitude": 39.164951,
        "longitude": -107.8469,
        "radius_km": 8
      },
      "target_interval": {
        "start_at": "2014-05-25T23:43:40Z",
        "end_at": "2014-05-25T23:47:12Z",
        "basis": "USGS global landslide seismic catalog event 13 origin plus its 212-second manually picked high-frequency duration."
      },
      "waveform_window": {
        "start_at": "2014-05-25T22:50:00Z",
        "end_at": "2014-05-26T01:20:00Z"
      },
      "matched_control_dates": [
        "2014-05-18",
        "2014-05-19",
        "2014-05-20",
        "2014-05-21",
        "2014-05-22",
        "2014-05-23",
        "2014-05-24"
      ],
      "roster_policy": {
        "maximum_distance_km": 180
      },
      "stations": [
        {
          "id": "IW.SMCO",
          "network": "IW",
          "station": "SMCO",
          "location": "00",
          "channel": "BHZ",
          "latitude": 39.1776,
          "longitude": -106.9739,
          "distance_to_source_km": 75.27,
          "provider_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
        },
        {
          "id": "RE.PV07",
          "network": "RE",
          "station": "PV07",
          "location": "--",
          "channel": "HHZ",
          "latitude": 38.44215,
          "longitude": -108.644371,
          "distance_to_source_km": 105.994,
          "provider_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
        },
        {
          "id": "RE.PV15",
          "network": "RE",
          "station": "PV15",
          "location": "--",
          "channel": "HHZ",
          "latitude": 38.341541,
          "longitude": -108.480057,
          "distance_to_source_km": 106.759,
          "provider_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
        },
        {
          "id": "RE.PV22",
          "network": "RE",
          "station": "PV22",
          "location": "--",
          "channel": "HHZ",
          "latitude": 38.53509,
          "longitude": -108.78723,
          "distance_to_source_km": 107.405,
          "provider_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
        },
        {
          "id": "TA.O20A",
          "network": "TA",
          "station": "O20A",
          "location": "--",
          "channel": "BHZ",
          "latitude": 40.1348,
          "longitude": -108.2416,
          "distance_to_source_km": 113.013,
          "provider_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
        },
        {
          "id": "RE.PV21",
          "network": "RE",
          "station": "PV21",
          "location": "--",
          "channel": "HHZ",
          "latitude": 38.561289,
          "longitude": -108.974801,
          "distance_to_source_km": 118.499,
          "provider_url": "https://service.earthscope.org/fdsnws/dataselect/1/query"
        }
      ],
      "sources": [
        {
          "supports": "source coordinate, source interval, volume, stream disruption, and temporary impoundment",
          "url": "benchmark/event-metadata/west-salt-creek-2014-independent-label.json"
        },
        {
          "supports": "independent rock-avalanche mechanism, runout, seismic recording, and streamflow disruption",
          "url": "https://www.usgs.gov/programs/landslide-hazards/science/reconstruction-avalanche-west-salt-creek-rock-avalanche"
        }
      ]
    }
  ],
  "roster_policy": {
    "selection": "nearest_unique_vertical_broadband_channels_from_frozen_fdsn_registry",
    "maximum_stations": 6,
    "maximum_distance_km": 180,
    "minimum_sample_rate_hz": 20
  },
  "availability_policy": {
    "mode": "confirmation_quorum",
    "minimum_available_stations": 3,
    "individual_missing_station_health": "degraded"
  },
  "acceptance_criteria": {
    "event_watch_recall": "Both untouched river-blocking events produce a two-station watch overlapping the independently frozen source interval.",
    "event_confirmation_recall": "Both untouched river-blocking events produce a three-station causal envelope-coherence confirmation overlapping the independently frozen source interval.",
    "matched_control_confirmations": "Zero confirmation survives across all fourteen same-clock prior-day controls.",
    "off_target_confirmations": "Zero confirmation survives outside either positive event's independently frozen source interval.",
    "availability": "Every event and control window retains at least three checksum-verified waveforms; individual missing feeds are reported as degraded.",
    "earthquake_catalogs": "Every event and control window has checksum-verified USGS catalog evidence for the unchanged causal earthquake veto.",
    "public_dispatch": "Always false. This holdout evaluates internal watch and confirmation candidates only."
  },
  "prior_frozen_protocol": "benchmark/v0.18-federated-station-development.json",
  "prior_frozen_result": "validation/v0.18-federated-station-development.json",
  "acquisition_repair_reason": null
}