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TitreA review of reservoir monitoring and reservoir-triggered seismicity in Canada
AuteurLamontagne, M; Rogers, G; Cassidy, J; Tournier, J -P; Lawrence, M S
SourceBulletin of the Seismological Society of America vol. 108, no. 5B, 2018 p. 3062-3079, https://doi.org/10.1785/0120180009
Année2018
Séries alt.Ressources naturelles Canada, Contribution externe 20170322
ÉditeurSeismological Society of America (SSA)
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1785/0120180009
Mediapapier; en ligne; numérique
Formatspdf (Adobe® Reader®); html
ProvinceCanada; 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
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
Sujetsséismologie; sismicité; secousses séismiques; risque de tremblement de terre; magnitudes des séismes; eaux de surface; reservoirs; barrages; réseau sismique; pressions interstitielles; géologie du substratum rocheux; caractéristiques structurales; failles; niveaux d'eau; Bouclier Canadien; Cordillère canadienne; Réseau national sismologique canadien; surveillance; géophysique; géologie structurale
Illustrationsplots; tables; location maps; geoscientific sketch maps; schematic representations; time series
ProgrammeGéoscience de l'environnement, Gaz de schiste - sismicité induite
Diffusé2018 08 14
Résumé(disponible en anglais seulement)
Canada has four of the 20 largest water reservoirs in the world, with 16 that are at least 75 m deep and have a volume greater than 109 m3. Eleven of these are located in the Canadian Shield of Quebec, and five are located in the Cordillera of British Columbia and Alberta. Six of these large reservoirs, along with two other smaller reservoirs, have been associated with reservoir-triggered seismicity (RTS). The proportion of reservoirs with an RTS that is larger than Nuttli magnitude MN 3.0 (25%; i.e., four cases) is similar to the one for worldwide counterparts (22%). All RTS cases are located in the Canadian Shield of Quebec, which is an area that is weakly seismically active. RTS is of a small magnitude (the largest event was magnitude MN 4.1). Based on the known cases of RTS and those that had no associated seismicity, there are a few conclusions that can be drawn. Before the mid 1970s, many potential triggered earthquakes could have been below the detection threshold that was offered by the Canadian National Seismograph Network (CNSN) at the time (generally magnitude 3.5). The weight of the reservoirs does not appear to be the main factor that triggers RTS; two of the reservoirs with the largest volumes do not have any associated activity. In all RTS cases, it is almost impossible to relate the activity to specific fault characteristics. In some RTS cases, filling was not completed when the RTS started. For these cases, it is not easy to distinguish between a rapid response (such as the weight of the reservoir increasing the pore-fluid pressures at depth) and the delayed type of response, in which the pore-fluid pressure diffusion leads to reactivation of the fault. For the majority of RTS cases, however, a delayed-response type appears more likely; that is, it is more likely that activity that is started shortly after the initial impoundment will continue for many months, sometimes in swarms, and finally stop after a few years.
Résumé(Résumé en langage clair et simple, non publié)
Le Canada possède quatre des 20 plus grands réservoirs d'eau du monde, dont 16 ont une profondeur d'au moins 75 m et un volume supérieur à 109 m3. Onze d'entre eux sont situés dans le bouclier canadien du Québec et cinq dans la Cordillère de la Colombie-Britannique et de l'Alberta. Six de ces grands réservoirs ont été associés à de la sismicité déclenchée par les réservoirs et deux autres cas dans de plus petits réservoirs.
GEOSCAN ID306417