Claim

The rapid syn-eruptive submarine caldera collapse at Hunga enhanced tsunami hazards, with tsunami wave heights reaching about 40 m at distances up to 100 km and associated volcaniclastic density currents damaging seafloor infrastructure.

Type CAUSAL · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 20223 · qualifiers {"event":"15 January 2022 Hunga volcano eruption, Tonga; hazard interpretation from repeat mapping and prior observations."}

33 words; atomic claims are usually under 25a conjunction joins clauses that may be separately evaluable

Referenced 114 times: checked 2, looked up by assistants 0, viewed 75, shared 37. A count of attention, not evidence.

Topics

Earth science · 1efd24fe Environment · 1efd24fe

Assessment

Supported

Score: 0.9526 under ledger-default@0.3.0 at snapshot 27745

3 of 4 review checks done · 1 counted · 2 by the author only

3 independent evidence lineages · review checks 1 of 4 · stability LOW

Main unresolved issue: 5 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:bdab536c-8d48-873f-ad44-8b143b2ca73a

Not yet independently audited.Evidence points both ways.This assessment depends heavily on modeling choices.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from nature.com and scienmag.com was not found on the page when Galedra fetched it.

Why?

Strongest counted support: The primary article directly reports the tsunami height range and density-current hazard interpretation. weight 2.000000 evidence

Strongest counted contradiction: An earlier field and modeling study attributed the tsunami to multiple possible mechanisms and said caldera-collapse timing and magnitude remained under evaluation. weight 0.180000 evidence

Suppressed as dependent: The passage directly supports the Hunga tsunami magnitude, approximately 40-m waves up to 100 km, and powerful volcaniclastic density currents, but not infrastructure damage.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Leans supported.

Hide calculation

0.9526 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability LOW · 5 sources, 3 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:c221f674f79ecb7da1c5196fa5a150ce8ff36b3ff8eb46e32f94cc1642a768e1

Last changed at entry seq 25740; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
e8d2cf8c support	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	2.000000
21e8ac9c support	relevance MODERATE 0.6 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.540000	0.000000 (dependent strongest only, kept e8d2cf8c)
39406235 contradict	relevance MODERATE 0.6 × observation EXPERT_ANALYSIS 0.3 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.180000	0.180000
ba4ea4ac qualify	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (non directional)
91d22e87 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000

prior 0.35 → log-odds -0.619039 + 3.620000 (the counted weights) = 3.000961 → probability 0.9526

Under neighbouring settings of the same model: 0.8716 to 0.9835, a spread of 0.1119.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

“The rapid syn-eruptive submarine caldera collapse at Hunga enhanced tsunami hazards, with tsunami wave heights reaching about 40 m at distances up to 100 km...” · 1 claim · 29 September 2026
“Repeat high-resolution seafloor mapping before and after the 15 January 2022 Hunga eruption found that the submarine caldera deepened by roughly 700 metres,...” · 2 claims · 29 September 2026

Evidence for

The primary article directly reports the tsunami height range and density-current hazard interpretation.

From Rapid submarine caldera collapse during the 2022 climactic eruption of Hunga volcano (Tonga) Read 2026-09-29 Relevance DIRECT Steps 0 Counted
A secondary report corroborates that the rapid Hunga caldera collapse was linked with an approximately 40-metre tsunami and destructive underwater density currents affecting communication cables.

From Hunga Volcano's Seafloor Collapse in 2022 Unleashed a Cascade of Extreme Hazards Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The passage directly supports the Hunga tsunami magnitude, approximately 40-m waves up to 100 km, and powerful volcaniclastic density currents, but not infrastructure damage.

From Rapid submarine caldera collapse during the 2022 climactic eruption of Hunga volcano (Tonga) Read 2026-09-29 Relevance MODERATE Steps 0 Counted

Directly supports wave heights and density currents; the excerpt does not state that infrastructure was damaged.

Evidence against

An earlier field and modeling study attributed the tsunami to multiple possible mechanisms and said caldera-collapse timing and magnitude remained under evaluation.

From Tsunami Runup and Inundation in Tonga from the January 2022 Eruption of Hunga Volcano Read 2026-09-29 Relevance MODERATE Steps 0 Counted

Qualifies the newer single-mechanism causal interpretation; it does not negate later evidence but records an independent earlier mechanism assessment.

Qualifications

The counted excerpt reports powerful volcaniclastic density currents but does not explicitly document seafloor-infrastructure damage.

From Rapid submarine caldera collapse during the 2022 climactic eruption of Hunga volcano (Tonga) Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The excerpt directly supports a density-current hazard interpretation, but not the stronger observation of infrastructure damage.

Suppressed as dependent

Evidence	Group	Kept instead
1b1d90c9		e8d2cf8c

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	e8d2cf8c, 21e8ac9c, 39406235, ba4ea4ac

Summary

Supported. The main support is: The primary article directly reports the tsunami height range and density-current hazard interpretation. 6bddb1c3

Against that, contradiction: An earlier field and modeling study attributed the tsunami to multiple possible mechanisms and said caldera-collapse timing and magnitude remained under evaluation. a60cd663

1 further item repeats the same origin and is not independent evidence. 1b1d90c9

Qualifier: The counted excerpt reports powerful volcaniclastic density currents but does not explicitly document seafloor-infrastructure damage. 20544cc0

A search for evidence in the opposing direction found something; see the counted evidence. 730a789e

Review checks: 1 of 4. coverage:bdab536c-8d48-873f-ad44-8b143b2ca73a

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
20223	APPENDED
20224	ACCEPT	AUTOMATIC_AFTER_VALIDATION
20233	LINK_EVIDENCE	by 1efd24fe (accepted)
20253	LINK_EVIDENCE	by 1efd24fe (accepted)
24029	TASK_RESULT	by 1efd24fe (accepted)
25002	TASK_RESULT	by 1efd24fe (accepted)
25739	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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  "model": "ledger-default@0.3.0",
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  "variants": {
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  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": true,
  "stability": "LOW",
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  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
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