Macroseismic and landslide information on the 1663 moment magnitude (M) 7 earthquake, Charlevoix, Quebec
Bibliographic record
Abstract
The February 5, 1663, magnitude 7 Charlevoix earthquake occurred at approximately 5:30 p.m. local time (February 5, 1663, 22:30 U.T.). This earthquake is one of five known moment magnitude 5.5-7 events that occurred in the Charlevoix Seismic Zone (CSZ) between 1663 and the present. Due to the sparse population at the time, the exact position of the epicenter and the magnitude are still debated. The Charlevoix Seismic Zone is generally assumed as the epicentral region based on its historical earthquakes and its sustained lower magnitude earthquake activity. Given that this earthquake occurred in the mid 1600's and far from the few existing towns, felt accounts are limited in number. Available historical documents reveal that it was felt by the then 2500 inhabitants of New France mostly concentrated in three towns (Quebec City, Trois-Rivières, Montréal), and by other inhabitants of New England and New Holland. The macroseismic information is augmented by landslides (subaqueous and terrestrial) and sedimentation events which likely were triggered by the 1663 earthquake. Most of these mass movements are dated using either C14 or sedimentation rate methods. These mass movements are used as proxies to estimate both the magnitude of the earthquake and its epicentre. This Open File Report presents the macroseismic information and its ratings on the Modified Mercalli Scale for a total of eight locations for Canada. For each 2 locality, the felt information is rated on the Modified Mercalli intensity (MMI) scale and tabulated in a Microsoft Excel sheet. The text of some of the newspaper accounts are reproduced. The Open File also provides a GoogleEarth kmz file that allows the felt information reports to be viewed in a geographic visualization tool.
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 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 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.007 | 0.011 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.084 | 0.019 |
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".