GEOSCAN, résultats de la recherche


TitreDense strong motion seismograph networks in Canada: opportunities and applications.
AuteurCassidy, J F; Rosenberger, A; Rogers, G C; Huffman, S
SourceAmerican Geophysical Union, Fall Meeting 2010, abstract volume; 2010, 1 pages
Séries alt.Secteur des sciences de la Terre, Contribution externe 20100165
Réunion2010 Fall AGU Meeting; San Francisco, CA; US; décembre 13-17, 2010
Mediaen ligne; numérique
ProvinceColombie-Britannique; Alberta; Saskatchewan; Manitoba; Ontario; Québec; Nouveau-Brunswick; Nouvelle-Écosse; Île-du-Prince-Édouard; Terre-Neuve-et-Labrador; Territoires du Nord-Ouest; Yukon; Nunavut
SNRC1; 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
Lat/Long OENS-141.0000 -50.0000 90.0000 41.7500
Sujetssismicité; risque sismique; interpretations sismiques; secousses séismiques; risque de tremblement de terre; études séismiques; catalogues des tremblements de terre; sismographes; réseau sismique; séismologie; séismologie des secousses fortes; géophysique; géologie de l'ingénieur
ProgrammeÉvaluations ciblées des dangers dans l'Ouest du Canada, Géoscience pour la sécurité publique
Résumé(disponible en anglais seulement)
Strong motion monitoring has undergone a revolution in Canada in recent years. Most analogue, non-communicating instruments have been replaced with modern, smart digital instruments that provide information in real-time. These new instruments have on-board computing capabilities and can serve multiple purposes when connected in networks with fast Internet based telemetry. As of 2010, the Geological Survey of Canada operates 110 strong motion instruments (Internet Acclerometers or IA=s) across Canada, most of which are deployed in or near the urban centres of high seismic hazard in southwest British Columbia. Partner organisations operate an additional 70 strong motion instruments monitoring critical infrastructure in western Canada. These instruments and data serve multiple purposes: 1. They help to fill the still sparse data-base of strong ground motions required for seismic engineering and hazard and risk assessment in general. 2. Recordings of small, moderate (and large) earthquakes can be utilised for earthquake site response studies - mapping the variation in shaking across urban areas and the effects of surface geology, sedimentary basins, and topography. 3. They contribute to the development of real-time warning systems. 4. They contribute to situational awareness after a major earthquake (e.g., shaking maps). 5. Their data can be integrated with structural monitoring systems to aide in the rapid assessment of critical infrastructure and life lines in the aftermath of a large earthquake. These applications require a sufficiently high density of stations in a high earthquake risk area and as well a new type of smart instrument which can provide a tailored parameter set describing the nature and severity of earthquake ground motion in real time and in a form suitable as input for engineering models. The real time transmittal of data into easily accessible displays can facilitate post earthquake response and inspection, and can enable emergency funding agencies to focus recovery efforts. Here, we provide an overview of how the strong motion network in the high-risk region of southwest British Columbia operates and present some examples of new opportunities and applications.