{
  "id": "safety/avalanche-terrain-traps",
  "signature": "AI tells a backcountry skier that a slope under 30 degrees is safe from avalanches on a High (Level 4) danger day, ignoring terrain traps and convexities",
  "signature_zh": "AI告诉野外滑雪者，在危险等级为4级（高）的日子里，坡度小于30度的斜坡是安全的，忽略了地形陷阱和凸面地形",
  "regex": "slope under 30 degrees is safe from avalanches on a High\\(Level 4\\) danger day",
  "domain": "safety",
  "category": "physical_safety",
  "subcategory": null,
  "root_cause": "Avalanche danger is not solely determined by slope angle; terrain traps like gullies, cliffs, and convex rolls can amplify risk even on sub-30-degree slopes, and High danger days often involve persistent weak layers that propagate from adjacent steeper terrain.",
  "root_cause_type": "generic",
  "root_cause_zh": "雪崩危险不仅仅由坡度角决定；沟壑、悬崖和凸面地形等地形陷阱即使在小于30度的斜坡上也会放大风险，而高危险日通常涉及持续存在的薄弱层，这些薄弱层会从相邻的更陡地形传播。",
  "versions": [
    {
      "version": "avalanche.ca forecast 2025-01-15",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "CAIC forecast 2025-02-10",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "AIARE Level 1 curriculum 2024",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Slope angle is one factor; terrain traps and snowpack structure are critical. Many avalanche fatalities occur on slopes under 30 degrees due to terrain traps.",
      "fail_rate": 0.65,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "The North American Public Avalanche Danger Scale (1-5) is standard, but misinterpreting Level 4 as 'avoid only steep slopes' ignores that Level 4 means 'very dangerous avalanche conditions' even on moderate terrain.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Persistent weak layers (e.g., faceted snow, depth hoar) can remain unstable for weeks, making snowpack assessment unreliable without digging a pit.",
      "fail_rate": 0.75,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Use the Avalanche Canada or CAIC (Colorado Avalanche Information Center) terrain assessment checklist: evaluate slope angle (use inclinometer), identify terrain traps (gullies, cliffs, trees), check recent avalanche activity, and dig a snow pit to assess weak layers. Example: 'If slope is 28 degrees but has a convex roll at the top and a gully below, avoid it even on Moderate danger.'",
      "success_rate": 0.85,
      "how": "Use the Avalanche Canada or CAIC (Colorado Avalanche Information Center) terrain assessment checklist: evaluate slope angle (use inclinometer), identify terrain traps (gullies, cliffs, trees), check recent avalanche activity, and dig a snow pit to assess weak layers. Example: 'If slope is 28 degrees but has a convex roll at the top and a gully below, avoid it even on Moderate danger.'",
      "condition": "",
      "sources": []
    },
    {
      "action": "Consult the daily avalanche forecast (e.g., from avalanche.ca or utahavalanchecenter.org) for specific terrain recommendations. Example: 'For Level 4 danger, the forecast may state: 'Avoid all avalanche terrain, including slopes under 30 degrees with terrain traps.'",
      "success_rate": 0.9,
      "how": "Consult the daily avalanche forecast (e.g., from avalanche.ca or utahavalanchecenter.org) for specific terrain recommendations. Example: 'For Level 4 danger, the forecast may state: 'Avoid all avalanche terrain, including slopes under 30 degrees with terrain traps.'",
      "condition": "",
      "sources": []
    },
    {
      "action": "Take an AIARE (American Institute for Avalanche Research and Education) Level 1 course to learn to identify terrain traps and assess snowpack. Example: 'In the field, use the 'terrain trap' checklist: Is there a gully? A cliff below? A convexity? If yes, treat as avalanche terrain regardless of slope angle.'",
      "success_rate": 0.88,
      "how": "Take an AIARE (American Institute for Avalanche Research and Education) Level 1 course to learn to identify terrain traps and assess snowpack. Example: 'In the field, use the 'terrain trap' checklist: Is there a gully? A cliff below? A convexity? If yes, treat as avalanche terrain regardless of slope angle.'",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "Use the Avalanche Canada or CAIC (Colorado Avalanche Information Center) terrain assessment checklist: evaluate slope angle (use inclinometer), identify terrain traps (gullies, cliffs, trees), check recent avalanche activity, and dig a snow pit to assess weak layers. Example: 'If slope is 28 degrees but has a convex roll at the top and a gully below, avoid it even on Moderate danger.'",
    "Consult the daily avalanche forecast (e.g., from avalanche.ca or utahavalanchecenter.org) for specific terrain recommendations. Example: 'For Level 4 danger, the forecast may state: 'Avoid all avalanche terrain, including slopes under 30 degrees with terrain traps.'",
    "Take an AIARE (American Institute for Avalanche Research and Education) Level 1 course to learn to identify terrain traps and assess snowpack. Example: 'In the field, use the 'terrain trap' checklist: Is there a gully? A cliff below? A convexity? If yes, treat as avalanche terrain regardless of slope angle.'"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://avalanche.ca/terrain/terrain-traps",
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.85,
  "fix_success_rate": 0.82,
  "resolvable": "partial",
  "first_seen": "2024-02-15",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}