Third Generation seismic hazard model for Canada: grid values of hazard used with the 1985, 1990, and 1995 National Building Codes of Canada
Bibliographic record
Abstract
Canada's 3rd Generation seismic hazard model was the basis for the seismic design provisions in the 1985, 1990, and 1995 National Building Codes of Canada. These codes use best-estimate ground motion on firm soil sites for a probability of exceedance of 10% in 50 years. The ground motion was quantified by seismic hazard values for two parameters: peak acceleration and peak velocity. For consistency with our later products, we tabulate code values of the two parameters for more than 200,000 grid points over Canadian territory and surrounding areas. Values at four probability levels ranging from 1 in 100 to 1 in 1000 years are also provided which allows for the construction of 3rd Generation hazard curves for every locality in Canada. The information retroactively comprehensively documents the basis for earthquake-resistant design for buildings constructed according to the requirements of the 1985 to 1995 codes, and may prove useful in structural retrofit decisions.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.003 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.012 | 0.002 |
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".