Earthquake damage in the Ottawa-Gatineau region between 1830 and 2008
Notice bibliographique
Résumé
Based on its earthquake hazard and population, the seismic risk of the OttawaGatineau region ("the region '') ranks third in Canadian urban areas. As part of a research activity that aims at defining microseismic zoning for the region, the historical earthquake damage was examined The available written documents were searched for iriformation on damage related to some eighteen events that were most likely to have had some impact in the region. It was found that between years 1830 and 2008, thirteen of these earthquakes reached or exceeded the Modified Mercalli Intensity (MMI) V level (fallen smalt abjects). Being located within the Western Quebec Seismic Zone, the region was subjected to some moderate earthquakes (magnitude between 5.0 and 6.2) at less than 300 km epicentral distance. The local earthquakes of 1856, 1861, 1908, 1909, 1913, 1914, 1917, 1924, 1933, 1935, 1944 and 1983 Jal! in that category. More distant earthquakes had some impact in Ottawa in 1870, 1924 and 1925 (epicenters in the Charlevoix Seismic Zone at about 450-525 km epicentral distance), in 1929 (Attica, N Y. at about 350 km distance) and in 1988 (Saguenay region at about 470 km distance). The impact of these earthquakes in the Ottawa-Gatineau region was assembled in a database. For each earthquake, the database provides a description of damage together with ifs geographic coordinates, ifs corresponding MMI and the supporting document as scanned images. Historically, certain wards sustained higher levels of ground motions due to moderate to large earthquakes.We found that the 10-50 m thick basin centered on the Museum of Nature had most instances of MMI VI and VIL In contrast, areas with thin veneer of unconsolidateddeposits, such as the Parliament occurrences of damage. Since most earthquakes have occurred in the first half of the 20th century when Ottawa only occupied a small proportion of the current urban area, it is uncertain if the areas with most occurrences of damage present the highest risk for future earthquakes. Knowledge of these more hazardous areas, such as the basin centered on the Museum of Nature, is of importance for land use planning and emergency preparedness.Hill and the Hull ward of Gatineau had almost no occurrences of damage. Since most earthquakes have occurred in the first half of the 20th century when Ottawa only occupied a small proportion of the current urban area, it is uncertain if the areas with most occurrences of damage present the highest risk for future earthquakes. Knowledge of these more hazardous areas, such as the basin centered on the Museum of Nature, is of importance for land use planning and emergency preparedness.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,002 | 0,003 |
| Études des sciences et des technologies | 0,001 | 0,001 |
| Communication savante | 0,001 | 0,000 |
| Science ouverte | 0,001 | 0,001 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,002 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».