Paleoseismology of the Long Valley Fault, Central Otago, New Zealand
Bibliographic record
Abstract
ABSTRACT We document the paleoseismology of the Long Valley Fault, Central Otago, New Zealand. A single trench excavated across the 21 km long, northeast‐striking reverse fault reveals evidence for three ground‐rupturing earthquakes. Optically Stimulated Luminescence dates (including OxCal analysis) of displaced sedimentary units are used to constrain the timings of these events. The antepenultimate event is constrained at 74.4 ka (81.4–67.6 ka, 95% confidence interval), the penultimate event at 37.4 (55.2–19.1) ka, and the most recent event at 10.5 (14.3–6.7) ka. These events show a total of 5 ± 0.2 m of dip slip in the trench, with a range of 1–2 m displacement per event. The estimated magnitude and mean recurrence interval for the Long Valley Fault are Mw 6.9 ‐ 7.0 and 32.0 ± 12.3 kyrs, respectively. The study contributes to the growing Otago paleoseismic database, which will eventually be used to understand regional space–time deformation behaviours in transpressional tectonic environments.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 source (direct Gemma or distilled Codex), 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".