{"id": "2024-03-27-composite", "slug": "2024-baltimore-bridge-collapse", "url": "/incidents/2024-baltimore-bridge-collapse/", "label": "Baltimore bridge collapse", "summary": "On 26 March 2024, the container ship Dali lost power and issued a mayday before colliding with the Francis Scott Key Bridge in Baltimore, Maryland, causing the 1.6-mile structure to collapse into the river. At least 6 people were missing in the water following the incident. The collision triggered a major rescue operation and became a significant public safety event.", "incident_type": "collision", "vessels": ["Dali"], "vessel_types": ["container ship"], "location": "Baltimore, Maryland, USA", "tier": "A", "kind": "incident", "shape": "regime", "peak_date": "2024-03-27", "peak_level": 615.051, "peak_level_date": "2024-03-27", "onset_date": "2024-03-26", "end_date": "2024-04-09", "duration_days": 15, "composite": {"excess_area": 2837.3630000000003, "highest_since": "2021-03-31", "peak": 615.051, "peak_z": 6.8295904468007835, "percentile_of_peak_day": 99.829, "rank_of_peak_day": 5}, "signals": {"news": {"excess": 2477.129, "lead_days": 3, "peak_z": 4.090952217832203, "share_at_peak": 0.1417176869053669, "share_of_excess": 0.16828810755203655, "share_peak3": 0.1524494538229215}, "research": {"excess": 2341.193, "lead_days": 3, "peak_z": 6.264141981131394, "share_at_peak": 0.1736833789087244, "share_of_excess": 0.2385795851068365, "share_peak3": 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carriers": {"excess_ratio": 1.2013618074899413, "lifted": true, "peak_multiple": 2.5587668593448942, "peak_z": 2.866475560584888}, "Car carriers (ro-ro)": {"excess_ratio": 1.2505969011938023, "lifted": true, "peak_multiple": 2.15997968511935, "peak_z": 2.0303908706023766}, "Container & cargo ships": {"excess_ratio": 3.4507716049382715, "lifted": true, "peak_multiple": 15.319230769230769, "peak_z": 7.621508946882144}, "Gas carriers": {"excess_ratio": 0.9415637860082304, "lifted": false, "peak_multiple": 1.2779156327543424, "peak_z": 0.7983438666293816}, "Shipping in general": {"excess_ratio": 0.9963369963369964, "lifted": false, "peak_multiple": 1.4026079869600652, "peak_z": 0.9470408224394785}, "Tankers": {"excess_ratio": 1.0782247765006385, "lifted": false, "peak_multiple": 1.531548757170172, "peak_z": 1.2309434839836442}}, "groups_lifted": 3, "lead_group": "Container & cargo ships", "verdict": "spillover", "wiki": {"Bulk carrier": {"excess_ratio": 1.2013618074899413, "peak_z": 2.866475560584888}, "Cargo ship": {"excess_ratio": 2.048593656493118, "peak_z": 6.117880433958575}, "Chemical tanker": {"excess_ratio": 0.9961904761904762, "peak_z": 1.6299044820049888}, "Container ship": {"excess_ratio": 4.438552076393515, "peak_z": 9.246977912650664}, "Gas carrier": {"excess_ratio": 0.9180616740088106, "peak_z": 0.7601970574245981}, "LNG carrier": {"excess_ratio": 0.9622685185185185, "peak_z": 1.0398223056115512}, "Maritime transport": {"excess_ratio": 0.9669467787114846, "peak_z": 0.8191248955267775}, "Oil tanker": {"excess_ratio": 1.1123590112790978, "peak_z": 1.5421078257041347}, "Roll-on/roll-off": {"excess_ratio": 1.2505969011938023, "peak_z": 2.0303908706023766}, "Ship": {"excess_ratio": 0.998304126625212, "peak_z": 1.2904883099097526}, "Ship transport": {"excess_ratio": 1.2698412698412698, "peak_z": 2.5895191603208167}, "Tanker (ship)": {"excess_ratio": 0.9943859649122807, "peak_z": 1.4828903588698557}}}, "decay": {"attention_dividend": null, "days_to_baseline": 24, "days_to_baseline_note": null, "dividend_status": "experimental", "half_life_days": 4, "half_life_note": null, "peak_level_date": "2024-03-27", "post_floor_45_90": null, "pre_baseline": 78.352}, "attribution": {"alternatives": [], "confidence": "high", "single_cause": true}, "sub_peaks": [{"composite_peak": 158.242, "end_date": "2024-04-05", "onset_date": "2024-04-03", "peak_date": "2024-04-03", "peak_z": 5.911411214636548, "triggers": ["gdelt:c_teu"]}, {"composite_peak": 135.975, "end_date": "2024-04-09", "onset_date": "2024-04-08", "peak_date": "2024-04-08", "peak_z": 18.295412131237246, "triggers": ["gdelt:c_vessel"]}], "caveats": ["social = X only before Bluesky (2024-07-01); not comparable with today's series", "integrated and peak-day verdicts differ (smoothing artefact likely)", "coverage scored on title only (no excerpt) \u2014 measured ~8pp frame precision cost vs title+excerpt (docs/HANDOVER-incidents.md \u00a72.3)"], "coverage": {"source": "gdelt-bq", 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