Use of high-resolution shear-wave-reflection methods for determining earthquake fundamental site period response near Alfred, Ontario
Bibliographic record
Abstract
Fundamental site resonance periods due to earthquake shaking have been calculated in a sediment-filled bedrock basin located near Alfred, Ontario, using a high-resolution shear-wave-reflection method. This area is character- ized by postglacial marine (Champlain Sea) sediments exhibiting surface disturbance that has been postulated to be the result of paleo-earthquake activity ca. 7060 BP. Hence, the study of parameters that govern the basin response to shaking will aid in understanding deformation within this zone. Shear waves can provide straightfor- ward estimates of the fundamental site period from nearly vertical reflection travel times. Data have been collected at 21 locations that show wide variations in values of fundamental site periods. The quality of the reflection data strongly depends on near-surface conditions. A refraction study in one area provided the shear-wave velocities within bedrock and overburden necessary to evaluate the resonance amplification effect.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 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) | 0.001 | 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".