Research/Terra/ 417961
Task evidence / spatial-analysis

Amtrak stations in earthquake counties

PassComputational taskUnpublished draft
Download evidence JSON ↓

The question

417961
How many Amtrak stations are located in counties that experienced earthquakes in the last 30 days?
Exact submitted task and declared adaptations
How many Amtrak stations are located in counties that experienced earthquakes in the last 30 days?

Task conventions: Last 30 days refers to all records in the supplied archived earthquake snapshot, not the current date. The file is labelled Feb142025 but its recorded UTC event times run from 2025-01-16 02:25:36.580 through 2025-02-15 02:03:36.460; use all supplied events without an extra date or magnitude filter. Use the supplied 2024 county geometry. A county is affected when it intersects at least one earthquake point. A station qualifies when it is strictly within an affected county; points on original county boundaries do not qualify. Count each original station record once, retaining benchmark_row_id, regardless of multiple earthquake matches. The supplied sources define the question's coverage; do not substitute live data. For this task's required unknown_count, missing or invalid station geometry is unknown. A valid station outside every supplied county is outside the defined coverage and is excluded, not unknown; boundary points likewise do not qualify. You may disclose outside-coverage records separately.



Compute the answer using only the supplied immutable fixtures. Save the selected features with their benchmark_row_id and original geometry as an inspectable data artifact. In your accepted final answer include one JSON code block with count (integer), unknown_count (integer), coverage_note (string), and selection (an object with collectionId, itemId, assetKey for that artifact). Maps are optional. Do not request clarification: the task conventions are fixed. Do not use live substitutes, shrink the study question, or use external benchmark answers.

Delivery format: provide the answer object with all fields specified above as final_response on assess_result, alongside the inspected final artifact_refs. This replaces the JSON-code-block formatting requirement above. Blue attaches your explicit selection to the accepted final answer. Finish with a concise ordinary-language answer agreeing with that selected result; do not duplicate the JSON in chat.

Supplied immutable inputs:
[
  {
    "name": "US county boundaries",
    "edition": "Census TIGER/Line 2024",
    "units": {},
    "collectionId": "blue-generated--[resource id withheld]",
    "itemId": "[resource id withheld]",
    "assetKey": "data"
  },
  {
    "name": "Earthquake points, frozen 30-day snapshot",
    "edition": "Archive labelled Feb142025; observed event timestamps 2025-01-16 through 2025-02-15 UTC",
    "units": {},
    "collectionId": "blue-generated--[resource id withheld]",
    "itemId": "[resource id withheld]",
    "assetKey": "data"
  },
  {
    "name": "Amtrak railway stations",
    "edition": "USDOT BTS frozen GeoBenchX 2025 snapshot",
    "units": {},
    "collectionId": "blue-generated--[resource id withheld]",
    "itemId": "[resource id withheld]",
    "assetKey": "data"
  }
]

Outcome & verification

Independent artifact and delivery checks passed.

Duration
14m 47s
Recorded Blue tool calls
54
Total tokens
2,616,588
Model cost
Not recorded
Application revision
d50497ea9084f29c91b05406688f87035df98d8a
Release
terra-geobenchx-v1

Recorded final answer

314 Amtrak stations qualify, and the unknown_count is 0. ### Limitations - Coverage is limited to the supplied county, earthquake, and station snapshots. - Valid stations outside every supplied county and any stations on county boundaries are excluded, not counted as unknown. - Outside-coverage records were not separately counted. - Coverage is limited to the supplied 2024 county geometry, the supplied frozen earthquake snapshot, and the supplied frozen Amtrak station snapshot. - Coverage is limited to the supplied county snapshot. - Coverage is limited to the supplied archived earthquake snapshot. - Stations on original county boundaries do not qualify. - Outside-county and boundary cases stay excluded rather than being counted as unknown.

Independent checks

These checks are separate from the agent's own assessment. A successful job or an assertion of success is not enough to pass.

Expected count
314
Reported count
314
Computation verified
Yes
Answer fulfilled
Yes
Full grading and rubric record
{
  "expectedCount": 314,
  "actualCount": 314,
  "expectedMetrics": null,
  "actualMetrics": null,
  "computationCorrect": true,
  "answerFulfilled": true,
  "adjudication": null,
  "qualification": null,
  "reasons": []
}

Recorded investigation findings

The agent's reported hypotheses and assessments, retained as evidence of its process—not independent proof that the answer is correct. Failed calls retain their requested verdict, not an accepted assessment.

run_trial · completed

Does the supplied station snapshot expose any missing or invalid geometry that must be counted as unknown, and does it preserve benchmark_row_id and original point geometry for final selection?

assess_trial · completed · assessment: sufficient

The supplied station snapshot preserves benchmark_row_id on all 1,020 records and the geometry profile reports 1,020 Point geometries with invalidCount=0. The inspected source bounds and preview are consistent with the supplied nationwide station fixture, so this source trial is sufficient to establish that unknown_count from missing or invalid station geometry is 0 for the supplied snapshot.

run_trial · completed

Using only the supplied county, earthquake, and station fixtures, what qualifying Amtrak station records are strictly within earthquake-affected counties, and does the final selected set retain each benchmark_row_id only once?

assess_trial · completed · assessment: sufficient

Using only the supplied fixtures, the full-scope trial found 294 affected counties that intersect at least one supplied earthquake point. The qualifying-stations output contains 314 selected station records with original point geometry and benchmark_row_id retained. The dedupe summary reports unique_station_count=314 and max_rows_per_id=1, so each selected original station record is counted once.

assess_result · failed · requested assessment: sufficient

I verified 314 qualifying Amtrak station records strictly within earthquake-affected supplied counties. The saved selected-stations artifact retains benchmark_row_id and original point geometry, and unknown_count is 0 because the supplied station snapshot reports no missing or invalid geometries. Coverage remains limited to the supplied fixtures; valid stations outside the supplied counties and any stations on county boundaries are excluded rather than counted as unknown.

assess_result · completed · assessment: sufficient

The published final selection contains 314 qualifying Amtrak station records. The published supporting station-source output shows 1,020 valid point geometries with invalidCount=0, so unknown_count is 0. Coverage is limited to the supplied fixtures; valid stations outside the supplied county coverage and any stations on county boundaries are excluded rather than counted as unknown.

Recorded workflow

  1. 01

    Affected counties

    Recorded vector-spatial-join · succeeded

  2. 02

    Supplied counties

    Recorded source · succeeded

  3. 03

    Qualifying Amtrak stations

    Recorded output · succeeded

  4. 04

    Supplied station geometry source

    Recorded output · succeeded

  5. 05

    Supplied earthquakes

    Recorded source · succeeded

  6. 06

    Qualifying stations

    Recorded vector-spatial-join · succeeded

  7. 07

    Benchmark row id counts

    Recorded table-group-statistics · skipped

  8. 08

    Dedupe summary

    Recorded table-group-statistics · skipped

  9. 09

    Supplied stations

    Recorded source · succeeded

  10. 10

    Affected counties

    Recorded vector-spatial-join · succeeded

  11. 11

    Supplied counties

    Recorded source · succeeded

  12. 12

    Supplied earthquakes

    Recorded source · succeeded

  13. 13

    Qualifying stations

    Recorded vector-spatial-join · succeeded

  14. 14

    Benchmark row id counts

    Recorded table-group-statistics · succeeded

  15. 15

    Dedupe summary

    Recorded table-group-statistics · succeeded

  16. 16

    Supplied stations

    Recorded source · succeeded

  17. 17

    Affected counties

    Recorded output · succeeded

  18. 18

    Qualifying stations

    Recorded output · succeeded

  19. 19

    Dedupe summary

    Recorded output · succeeded

  20. 20

    Supplied Amtrak stations

    Recorded source · succeeded

  21. 21

    Supplied Amtrak stations

    Recorded output · succeeded

Activity

Recorded actions

Recorded observable actions only, not private reasoning. Raw payloads, geometry, private links and credentials are omitted; full evidence is retained privately. Activity/workflow lists bounded at 500 entries.

  1. Progress update

    I’ll inspect the supplied fixtures and test a small exact method first, then save the selected station records as the final artifact.

  2. get_analysis

    Recorded tool call · completed

  3. Progress update

    I found no retained analysis yet. Next I’m checking the supplied county, earthquake, and station snapshots so I can use their exact schema and bounds.

  4. get_collection

    Recorded tool call · completed

  5. get_collection

    Recorded tool call · completed

  6. get_collection

    Recorded tool call · completed

  7. update_analysis_brief

    Recorded tool call · completed

  8. inspect_artifact

    Recorded tool call · failed

  9. inspect_artifact

    Recorded tool call · failed

  10. inspect_artifact

    Recorded tool call · failed

  11. Progress update

    Artifact inspection needs a source-only trial or item metadata first. I’m reading the exact item records now so I can pick the right fields and avoid guessing processor inputs.

  12. get_item

    Recorded tool call · completed

  13. get_item

    Recorded tool call · completed

  14. get_item

    Recorded tool call · completed

  15. list_processors

    Recorded tool call · completed

  16. get_tool_help

    Recorded tool call · completed

  17. get_tool_help

    Recorded tool call · completed

  18. describe_processors

    Recorded tool call · completed

  19. describe_processors

    Recorded tool call · completed

  20. describe_processors

    Recorded tool call · completed

  21. list_processors

    Recorded tool call · completed

  22. describe_processors

    Recorded tool call · completed

  23. describe_processors

    Recorded tool call · completed

  24. describe_processors

    Recorded tool call · completed

  25. describe_processors

    Recorded tool call · completed

  26. get_tool_help

    Recorded tool call · completed

  27. get_tool_help

    Recorded tool call · completed

  28. Progress update

    The main open uncertainty is how the station snapshot records missing or invalid geometry. I expect a source-only trial to expose the original station fields and any geometry-quality notes before I lock in the final count method.

  29. run_trial

    Recorded tool call · completed

  30. Progress update

    The station fixture looks clean so far: 1,020 point records, benchmark_row_id present on all rows, and the source profile reports 0 invalid geometries. I’m pulling the saved trial report, then I’ll run the exact county→earthquake→station selection and save the final selected stations artifact.

  31. get_trial_report

    Recorded tool call · completed

  32. assess_trial

    Recorded tool call · completed

  33. get_tool_help

    Recorded tool call · completed

  34. get_tool_help

    Recorded tool call · completed

  35. get_tool_help

    Recorded tool call · completed

  36. get_tool_help

    Recorded tool call · completed

  37. get_tool_help

    Recorded tool call · completed

  38. get_tool_help

    Recorded tool call · completed

  39. Progress update

    I’ve got the exact method now: counties touched by any supplied earthquake point, then stations strictly within those counties using the topological within test, plus a small dedupe check on benchmark_row_id. I’m running that exact full-scope trial next.

  40. run_trial

    Recorded tool call · completed

  41. Progress update

    The exact full-scope trial finished. It found 294 affected counties and 314 qualifying station records, with the dedupe summary showing each selected benchmark_row_id only once. I’m checking the final selected artifact fields now so I can attach the exact saved selection in the result.

  42. inspect_workflow_results

    Recorded tool call · completed

  43. get_trial_report

    Recorded tool call · completed

  44. inspect_artifact

    Recorded tool call · completed

  45. inspect_artifact

    Recorded tool call · completed

  46. inspect_artifact

    Recorded tool call · completed

  47. inspect_artifact

    Recorded tool call · completed

  48. assess_trial

    Recorded tool call · completed

  49. get_tool_help

    Recorded tool call · completed

  50. assess_result

    Recorded tool call · failed

  51. Progress update

    The count itself is verified. Blue still needs a non-private final output before I can attach the answer, so I’m promoting the tested computation into a final saved workflow and inspecting that published selection artifact.

  52. propose_workflow

    Recorded tool call · failed

  53. Progress update

    The first saved draft was close. I’m correcting the requirement wiring so it only points at the final selection path, then I’ll run the saved workflow and inspect the final published artifact.

  54. propose_workflow

    Recorded tool call · completed

  55. Progress update

    The only remaining workflow gap is the unknown_count evidence path. I’m adding the inspected station source as a supporting output for that one requirement, without changing the tested selection method.

  56. propose_workflow

    Recorded tool call · completed

  57. execute_workflow

    Recorded tool call · completed

  58. get_workflow_run

    Recorded tool call · completed

  59. inspect_workflow_results

    Recorded tool call · completed

  60. Progress update

    I have the published final selection artifact now. I’m doing one last inspection of the published selection and the published supporting station source so the final assessment uses current published receipts.

  61. inspect_artifact

    Recorded tool call · completed

  62. inspect_artifact

    Recorded tool call · completed

  63. Progress update

    I have the final published outputs. I’m fetching their immutable inspection receipts one last time, then I’ll record the verified final result against the published selection artifact.

  64. inspect_artifact

    Recorded tool call · completed

  65. inspect_artifact

    Recorded tool call · completed

  66. assess_result

    Recorded tool call · completed

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