avalanche
Enable an AI agent to recognise a snow avalanche, record its development and consequences, and identify evidence and authority needed for monitoring, access restrictions or response.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex
Purpose and description
Enable an AI agent to recognise a snow avalanche, record its development and consequences, and identify evidence and authority needed for monitoring, access restrictions or response.
It can be Create an evidence-qualified event record and reconcile potentially duplicate avalanche reports.; Map release, movement and deposition areas while retaining uncertainty and observation times.; Classify release and size using explicitly identified schemes.; Link affected people, routes and assets to reported or confirmed consequences.; Flag missing observations and refer unresolved assessments to the responsible avalanche or response authority.; Track event-specific restrictions and response decisions against their evidence, jurisdiction and expiry..
Distinguishing features
Evidence identifies a release and downslope movement of snow, rather than only unstable snow or a forecast of possible release.
The event has an identifiable occurrence interval and footprint; a recurring avalanche path is a location that can host multiple events.
Moving material is predominantly snow under the provisional scope; predominantly rock, soil or ice requires a neighbouring classification or an explicit boundary decision.
A cornice collapse is recorded as an initiating event when it triggers a separate snow release; collapse alone does not automatically establish an avalanche.
Reported releases are treated as one event only when spatial, temporal and movement evidence supports their continuity.
Scope
+ Event identity, occurrence evidence and uncertainty
+ Release location, time, material and initiating circumstances
+ Movement through the avalanche path and resulting deposits
+ Event size, lifecycle and observed or estimated reach
+ People, assets and routes affected by this event
+ Event-specific monitoring, restrictions and response decisions
- Regional avalanche forecasts and general danger ratings
- Persistent terrain, avalanche paths and susceptibility maps
- Snowpack evolution and weather systems independent of this event
- People, vehicles and infrastructure as independently managed entities
- Rescue operations, medical treatment and incident command procedures
- Landslides, rockfalls, glacier calving and metaphorical avalanches unless registry research explicitly includes them
Characteristics
- Occurrence confidence
- reported | supported | confirmed | disputed | unknown, with evidence and assessment time Separates an observed event from a prediction, ambiguous report or mistaken identification.
- Occurrence interval
- earliest and latest plausible timestamps, with timezone and precision Supports event matching and distinguishes occurrence time from discovery time.
- Release classification
- classification label and named scheme; unknown or unresolved permitted Preserves distinctions between release mechanisms without assuming competing classification schemes are interchangeable.
- Initiating circumstance
- natural | human-associated | deliberate control | other | unknown, with attribution confidence Records evidence about initiation without treating proximity or timing as proof of causation.
- Event phase
- releasing | moving | depositing | movement ceased | unknown, timestamped and spatially qualified Distinguishes event progression from the separate question of whether the area is safe.
- Release and runout geometry
- mapped geometries; distance and elevation in metres; coordinate reference system and uncertainty Locates the event and establishes which places its movement actually reached.
- Avalanche size
- size class with named scale and version, supporting observations and confidence Makes size judgments interpretable without confusing physical dimensions with destructive potential.
- Deposit dimensions
- area in square metres, depth in metres and volume in cubic metres where supported Characterises accumulated material while preserving the difference between measurements and estimates.
- Affected entities
- links to people, routes, structures or other entities, with observed, reported or possible impact Connects the event to consequences without equating footprint overlap with confirmed harm.
- Event-specific access decision
- linked restriction or reopening decision, issuing authority, area, validity interval and evidence Allows an agent to report applicable decisions without independently declaring safe access.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.avalanche
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Occurrence and event boundaries Establishes whether an avalanche occurred and which observations describe the same event.
Avalanche reports can describe a forecast, old debris, multiple releases or different views of one release.
Occurrence evidence
Separates evidence of actual snow movement from suspected instability or predicted release.
Observed release or event traces
Records direct observations and interpreted traces together with their sources and limitations.
- What observation supports an actual release and downslope movement of snow? definition
- Who or what produced that evidence, when was it captured, and could the traces predate the reported event? provenance
Event continuity
Defines the occurrence interval and distinguishes one event from related or repeated releases.
Single or linked releases
Records the basis for merging reports or keeping successive releases distinct.
- What are the earliest and latest plausible occurrence times, distinct from discovery and reporting times? measurement
- Do observed releases form one continuous movement, separate events or a linked sequence, and what supports that boundary? boundary
Release and initiation Characterises where and how snow detached and what is known about initiation.
Release geometry and initiation distinguish avalanche mechanisms and support interpretation of event evidence.
Release material and form
Records released material, detachment form and the classification scheme used.
Release classification evidence
Connects a proposed avalanche type to observations rather than inferring it from consequences alone.
- What observations describe the released snow and support its assigned release type under a named classification scheme? definition
- Where is the release area, and which dimensions of its boundary or fracture were measured rather than estimated? measurement
Initiation attribution
Separates observed initiating circumstances from hypotheses about triggering conditions.
Trigger and supporting context
Records proposed initiation and links relevant snowpack, weather or activity evidence.
- What evidence supports the attributed trigger, and which alternative explanations remain plausible? provenance
- Which snowpack observations, weather conditions or preceding activities are relevant to this release, and how closely do they match its time and location? boundary
Movement, runout and deposition Tracks the avalanche from release through movement to its observed deposits.
An avalanche's event footprint and progression cannot be represented by its release point or a pre-existing path alone.
Movement and reach
Records observed movement, phase transitions and the extent reached.
Time-qualified movement footprint
Distinguishes observed passage from inferred or simulated reach.
- Which areas were observed to be traversed, at what times, and which portions of the footprint remain inferred? measurement
- What evidence establishes the latest known phase and whether movement has ceased throughout the recorded event area? provenance
Deposits and size
Describes deposited snow and records interpretable estimates of event magnitude.
Deposit extent and magnitude
Keeps measured deposit properties distinct from scale-based size judgments.
- What are the observed deposit extent and depth, and what uncertainty applies to any estimated volume? measurement
- Which size scale and version were used, and what observations justify the assigned class? provenance
Consequences and response constraints Links the avalanche to affected entities and records constraints governing event-specific action.
The agent must distinguish potential exposure from confirmed consequences and avoid interpreting cessation as permission to enter.
Exposure and confirmed impact
Records who or what may have been reached and what effects are supported by evidence.
Affected entities and outcomes
Separates possible involvement, reported involvement and verified consequences.
- Which people, routes or assets intersected the event footprint at the relevant time, and which links remain uncertain? boundary
- What evidence confirms burial, injury, damage or interruption, and when was each outcome last verified? provenance
Residual exposure and authorised action
Links unresolved local hazards and authoritative decisions to proposed actions around the event.
Access and response decision basis
Records applicable restrictions, assessment gaps and the authority responsible for action decisions.
- Which current assessments address additional releases or other hazards affecting access to this event's footprint? provenance
- What restriction or response decision applies, who issued it, and what reassessment is required before it can change? action
What the second pass must settle
- Does vr.tr.avalanche denote only snow avalanches, or does it also include ice, rock or other material avalanches?
- Does an existing Vercy world model already own this concept, requiring a registry link instead of a separate publication?
- Which avalanche classification and size schemes should be supported, and which distinctions cannot be reliably translated between them?
- What evidence and event-boundary conventions should govern separation of cascading, sympathetic or closely repeated releases?
- Which jurisdiction-specific authorities and assessment records govern restrictions, response activation and reopening around an avalanche event?