| Titre | Recent improvements to strong motion monitoring in Canada |
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| Auteur | Cassidy, J F ;
Bent, A L |
| Source | 2021 Annual Meeting, Seismological Society of America, technical sessions; Seismological Research Letters vol. 92, no. 2B, 2021 p. 1433, https://doi.org/10.1785/0220210025 |
| Image |  |
| Année | 2021 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20200700 |
| Éditeur | Seismological Society of America |
| Réunion | Seismological Society of America 2021 Annual Meeting; avril 19-23, 2021 |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1785/0220210025 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Canada; Colombie-Britannique; Alberta; Saskatchewan; Manitoba; Ontario; Québec; Nouveau-Brunswick; Nouvelle-Écosse; Île-du-Prince-Édouard; Terre-Neuve-et-Labrador; Territoires du Nord-Ouest; Yukon;
Nunavut; Canada |
| SNRC | 1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65;
66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560 |
| Sujets | séismologie; séismologie des secousses fortes; réseau sismique; instruments d'observation; données sismiques; Réseau national sismologique canadien; géophysique; Sciences et technologie; Nature et
environnement; Santé et sécurité |
| Programme | Géoscience pour la sécurité publique Risques géologique du tremblement de terre |
| Diffusé | 2021 04 01 |
| Résumé | (disponible en anglais seulement)
As of January, 2021, one of the most significant changes in strong motion monitoring in Canada since the first deployment of accelerometers in 1963, has been
completed. This upgrade provides ~100 new strong motion instruments co-located with weak-motion instruments (6-component) at Canadian National Seismograph Network (CNSN) bedrock sites with an additional ~40 sites (mostly bedrock) having stand-alone
strong motion instruments. The vast majority of these CNSN instruments are located in the high seismic hazard regions of Canada, especially Vancouver Island and southwest British Columbia, Haida Gwaii, and the St. Lawrence Valley region. Also, for
the first time, strong motion instruments are located in northern Canada.
The Titan instruments are currently streaming data at 100 s/s and have a maximum 4 g recording level. The continuous records from the Titan sensors are available by request
to the NRCan's National Waveform Archive. To ensure high availability and resiliency, all seismic data are sent simultaneously to two data centers: one in Sidney, British Columbia and one in Ottawa, Ontario. The acquisition systems forward the data
to an archive server, where the data are saved and available to the routine processing systems.
Strong motion waveform data and station metadata are freely available via a variety of methods.
In addition to these strong motion instruments there
are an additional 350+ strong motion instruments across Canada (mostly in British Columbia) owned and operated by other organisations (e.g., B C Ministry of Transportation and Highways, BC Hydro, and more). These instruments are primarily located on
soil sites.
With this recent CNSN upgrade, and the continued expansion of strong motion monitoring by other organisations across Canada, engineers will have access to more (and very valuable) strong motion data for Canadian earthquakes. This will
lead to improved earthquake hazard models, improved seismic design for infrastructure, and safer communities. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Ce document résume les mises à jour récentes du Réseau national canadien de mouvement fort. Il résume également d'autres systèmes canadiens de
surveillance des mouvements puissants. Ces nouvelles données sont d'une importance cruciale pour les ingénieurs et les intervenants d'urgence avant, pendant et après un tremblement de terre. Ces données fourniront les informations essentielles
nécessaires à la mise à jour des futurs modèles d'aléa sismique au Canada. |
| GEOSCAN ID | 328007 |
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