Deformation rates estimated from earthquakes in the northern Cordillera of Canada and eastern Alaska
Bibliographic record
Abstract
We estimate deformation rates from earthquake catalog statistics to investigate current strain distribution resulting from the collision of the Yakutat block with North America. The collision is accommodated over a broad region of Alaska and NW Canada in a variety of tectonic regimes. Our estimates have significant uncertainties, but the results are generally in agreement with other deformation rate estimates (GPS and geological data) and provide useful first‐order constraints on local long‐term tectonic deformation and seismic hazard. We estimate that 50–75% of relative plate motion is taken up by earthquakes on the Yakutat/North America boundaries, with lateral crustal extrusion, other far‐field strain, and possibly aseismic creep accommodating the remainder. We calculate dextral strike slip of 4.5–10.2 mm/a on the Denali fault system in Alaska, remarkably similar to late Pleistocene/Holocene rates from geomorphic offsets. Right‐lateral motion essentially bypasses the Denali fault in easternmost Alaska and westernmost Yukon, passing instead along the Totschunda and Duke River fault systems. Right‐lateral transpression of 5–10 mm/a suggests that the Alaskan fore arc does not have fully block‐like behavior. Between the Denali and Tintina‐Kaltag faults in Alaska, 10–20 mm/a of dextral shear is accommodated by several NE trending “bookshelf” faults. Significant seismic deformation (in cases higher than expected from GPS data) is indicated in the NE Cordillera, where preexisting faults have a strong control on the pattern and mechanisms of current deformation.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".