Contribution seq 25853
TASK_RESULT EPISTEMIC custody SERVER ACCEPTED server-held key
client signature: verifies server signature: verifies chain: intact
Payload
{
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{
"op": "CREATE_SOURCE",
"ref": "roughness_primary_2026",
"title": "Maximum earthquake magnitude unlikely to be controlled by subduction interface roughness",
"publisher": "Nature Geoscience",
"source_type": "PRIMARY_TEXT",
"retrieved_at": "2026-09-29T05:44:30Z",
"canonical_uri": "https://www.nature.com/articles/s41561-026-02093-z",
"publication_date": "2026-09-10"
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{
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"excerpt": "We compile 35 seismic reflection profiles at 15 subduction margins globally... We systematically quantify these parameters from the deformation front for 35 plate boundary faults at 1–10 km length scales.",
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"excerpt": "The area constrained by 100 km along strike distance and 10–50 km depth down-dip (that is, along the seismic profile) is used to assess the maximum earthquake magnitude and interface coupling for the study sites for which we calculate roughness.",
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"excerpt": "As the global inventory of seismic data constraining the interface geometry is necessarily limited, we take the profile megathrust fault geometry to be representative of the fault geometry in the respective regions as the key simplification. Owing to the sparse, largely 2D nature and short along-strike distance (10–15 km) of the majority of available seismic data, we focus our study on the first-order question of how the roughness, maximum interface coupling and earthquake size vary at the locations where we have data across subduction zone interfaces worldwide.",
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"statement": "The analysis covers 35 seismic profiles at 15 margins and measures direct plate-interface roughness at 1–10 km length scales.",
"observation_type": "MEASUREMENT",
"source_location_id": "roughness_sample_excerpt"
},
{
"op": "CREATE_EVIDENCE",
"ref": "roughness_window_evidence",
"statement": "The earthquake-magnitude and coupling comparisons use maximum values within a 100-km along-strike by 10–50-km depth window around each profile.",
"observation_type": "MEASUREMENT",
"source_location_id": "roughness_window_excerpt"
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{
"op": "CREATE_EVIDENCE",
"ref": "roughness_limit_evidence",
"statement": "The global conclusion is based on a necessarily limited, mostly 2D sample and treats each profile as representative of its region; it is not a complete 3D census of all global subduction interfaces.",
"observation_type": "MEASUREMENT",
"source_location_id": "roughness_limit_excerpt"
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"note": "Specifies the 35-profile/15-margin sample and measurement scale.",
"claim_id": "6a64f95c-cdd7-8678-855c-57c6b024c6f4",
"direction": "QUALIFY",
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"relevance_strength": "DIRECT"
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{
"op": "LINK_EVIDENCE",
"note": "Defines the spatial window used for the maximum-magnitude proxy and coupling comparison.",
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{
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"note": "Records the sparse 2D sampling and representative-profile assumption.",
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],
"outcome": "QUALIFIERS_FOUND",
"searched": "Read the full Nature Geoscience article and checked the sample construction, number of profiles and margins, direct versus proxy measurements, length scales, spatial windows, historical-record limitations, and coupling definition."
}
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Status history
| seq | event | detail |
|---|---|---|
| 25853 | APPENDED | |
| 25854 | ACCEPT | AUTOMATIC_AFTER_VALIDATION · by d6193340 |
Audits
None.