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Incident detail

Earthquake events · depth_km PSI drift

Deterministic evidence · read-only
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Incident summary

DATA DRIFT · WARNING severity

RESOLVED

Earthquake events

depth_km PSI drift · drift:depth_km:psi

Earthquake events depth_km PSI drift detected. Observed metric: 0.3982607335195844; threshold: 0.3.

Occurrences1Persisted observations
Last seen8:56:54 PM
Opened
Incident key
earthquake-events:drift:depth_km:PSI
Resolved

Deterministic root cause

A ranked explanation derived from persisted evidence. It is authoritative for this view; optional AI is shown later.

No AI inference
Top ranked causeDISTRIBUTION SHIFT
HIGH confidence

Probable cause: distribution shift. Evidence: psi distribution shift. Confidence: HIGH. Affected downstream assets: 3.

Ranked candidates

#1 DISTRIBUTION SHIFTHIGH confidencescore 10

Evidence used

psi distribution shiftDRIFT_RESULT · drift_resultsweight 10

Algorithm deterministic-rca-v1 · fingerprint 080f84c809c2… · created 9/11/2026, 8:56:52 PM

Evidence

Human-readable fields are the first view. Raw JSON remains available when exact payload inspection is useful.

1 occurrence
Method
PSI
Details.Epsilon
0
Details.Baseline Bins
[1.543999958038,2.255999994278,3.75448,5,7.379999876022,10,13.735,27.470000457764,51.83]
Details.Location Shift.P95 Shift
-15.934
Details.Location Shift.Mean Shift
-2.853
Details.Location Shift.Current P95
93.295
Details.Location Shift.Baseline P95
109.229
Details.Location Shift.Current Mean
17.62
Details.Location Shift.Median Shift
-2.38
Details.Location Shift.Baseline Mean
20.473
Details.Location Shift.Current Median
5
Details.Location Shift.Baseline Median
7.38
Details.Location Shift.Normalized Median Shift
-0.173
Details.Warning Threshold
0.15
Details.Current Distribution
[0.12,0.15,0.15,0.06,0.18,0.05,0.01,0.12,0.05,0.11]
Details.Baseline Distribution
[0.10091743119266056,0.10091743119266056,0.10091743119266056,0.0871559633027523,0.11009174311926606,0.08256880733944955,0.11467889908256881,0.10091743119266056,0.10091743119266056,0.10091743119266056]
Threshold
0.3
Column Name
depth_km
Drift Result Id
223
Observed Metric
0.398
Baseline Version
1
Current Sample Count
100
Baseline Sample Count
218
View raw evidence JSON
{
  "method": "PSI",
  "details": {
    "epsilon": 0.000001,
    "baseline_bins": [
      1.543999958038,
      2.255999994278,
      3.75448,
      5,
      7.379999876022,
      10,
      13.735,
      27.470000457764,
      51.83
    ],
    "location_shift": {
      "p95_shift": -15.933950000000024,
      "mean_shift": -2.852990761810595,
      "current_p95": 93.29499999999997,
      "baseline_p95": 109.22895,
      "current_mean": 17.62048601014471,
      "median_shift": -2.3799998760223406,
      "baseline_mean": 20.473476771955305,
      "current_median": 5,
      "baseline_median": 7.379999876022341,
      "normalized_median_shift": -0.1731642580303148
    },
    "warning_threshold": 0.15,
    "current_distribution": [
      0.12,
      0.15,
      0.15,
      0.06,
      0.18,
      0.05,
      0.01,
      0.12,
      0.05,
      0.11
    ],
    "baseline_distribution": [
      0.10091743119266056,
      0.10091743119266056,
      0.10091743119266056,
      0.0871559633027523,
      0.11009174311926606,
      0.08256880733944955,
      0.11467889908256881,
      0.10091743119266056,
      0.10091743119266056,
      0.10091743119266056
    ]
  },
  "threshold": 0.3,
  "column_name": "depth_km",
  "drift_result_id": 223,
  "observed_metric": 0.3982607335195844,
  "baseline_version": 1,
  "current_sample_count": 100,
  "baseline_sample_count": 218
}

Blast radius

Downstream assets captured when this incident was evaluated.

Open dataset lineage
USGS Quality EvaluationPROCESS · distance 1
dataset:earthquake-eventsprocess:quality-usgs
Quality APIAPI · distance 2
dataset:earthquake-eventsprocess:quality-usgsapi:quality
Quality DashboardDASHBOARD · distance 3
dataset:earthquake-eventsprocess:quality-usgsapi:qualityui:quality-dashboard

Lifecycle

Chronological state transitions recorded for this incident.

2 events
  1. OPENED

    Earthquake events depth_km PSI drift detected. Observed metric: 0.3982607335195844; threshold: 0.3.

    OPEN
  2. RESOLVED

    depth_km drift recovered.

    OPEN toRESOLVED

AI Incident Copilot

Optional explanatory context based on the same persisted evidence. It cannot change incident state.

Optional · non-authoritative
FALLBACKdeterministic-fallback · deterministic-rca-v1
Deterministic OpenDQ analysis identifies distribution shift as the leading explanation with high confidence.

This explanation follows the persisted deterministic RCA result. The leading cause is distribution shift; the AI provider was not used or was unavailable.

Evidence highlights

drift-result:223{"column": "depth_km", "method": "PSI", "metric": 0.3982607335195844, "status": "DRIFT", "threshold": 0.3}

Suggested investigation

  1. Compare the current distribution with the stored baseline and inspect the affected column.

Uncertainties

No additional uncertainties recorded.

Prompt incident-copilot-v1 · generated 9/11/2026, 8:56:55 PM · new analysis