{"schema_version":"secwatch.filing_event.v1","accession":"0001710366-26-000034","form_type":"8-K","ticker":"CNR","cik":"0001710366","company_name":"Core Natural Resources, Inc.","filed_at":"2026-05-04T23:59:59+00:00","discovered_at":"2026-05-14T18:02:32.786377+00:00","generated_at":"2026-05-14T23:56:53.126053+00:00","sec_items":["1.04"],"event_type":"regulatory","sentiment":"negative","materiality_score":0.3,"confidence":"high","headline":"Core Natural Resources subsidiary receives imminent danger order at Mountaineer II mine for methane","bullets":["Mingo Logan Coal LLC received a 107(a) order on April 29, 2026 at Mountaineer II mine in Logan County, WV.","Methane levels exceeded 5.0% in intake entry crosscuts and ranged from 1.0% to 2.2% in the center.","Mine personnel took prompt actions to alleviate the condition; MSHA terminated the order the same day.","No injuries or illnesses resulted from the temporary methane accumulation incident."],"urls":{"canonical":"https://secwatch.observer/filing/0001710366-26-000034","json":"https://secwatch.observer/filing/0001710366-26-000034.json","markdown":"https://secwatch.observer/filing/0001710366-26-000034.md","text":"https://secwatch.observer/filing/0001710366-26-000034.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1710366/000171036626000034/0001710366-26-000034-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1710366/000171036626000034/cnr-20260429.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud","generated_at":"2026-05-14T23:56:53.126053+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}