| Title | Geotechnical investigations of an earthquake that triggered disastrous landslides in eastern Canada about 1020 cal BP |
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| Author | Wang, B |
| Source | Geoenvironmental Disasters vol. 7, issue 1, 2020 p. 1-13, https://doi.org/10.1186/s40677-020-00157-9  Open Access |
| Image |  |
| Year | 2020 |
| Alt Series | Natural Resources Canada, Contribution Series 20200122 |
| Publisher | Springer |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf; html |
| Province | Ontario; Quebec |
| NTS | 31F/01; 31F/08; 31F/09; 31F/16; 31G/03; 31G/04; 31G/05; 31G/06; 31G/11; 31G/12; 31G/13; 31G/14 |
| Area | Ottawa; Gatineau |
| Lat/Long WENS | -76.4278 -75.1556 45.9219 45.2439 |
| Subjects | surficial geology/geomorphology; engineering geology; Nature and Environment; Science and Technology; Health and Safety; seismology; earthquakes; earthquake damage; earthquake risk; seismic risk;
landslides; slope failures; slope stability analyses; sensitive clays; models; Landslides; Phanerozoic; Cenozoic; Quaternary |
| Illustrations | location maps; graphs; cross-sections |
| Released | 2020 06 24 |
| Abstract | Geotechnical studies are carried out to investigate the location and magnitude of a prehistoric earthquake in eastern Canada. Previous studies identified 12 sensitive clay landslides of about 1020 cal
BP in the Ottawa-Gatineau region, including one of the most disastrous slope failures in eastern Canada. The landslides were hypothesized to have been triggered by an earthquake. In the current study, three of those landslides are investigated to
understand their failure mechanisms. The study sites form a triangle of lateral distances of about 38, 38 and 35 km. Micro-seismic surveys, cone penetrometer tests, vane shear tests, soil sampling and laboratory testing are conducted to collect
geotechnical data. Slope stability models are constructed to calculate threshold ground accelerations required to trigger the landslides. The ground accelerations are used with Ground-Motion Prediction Equations to triangulate the earthquake. The
results indicate an earthquake of a minimum moment magnitude of 5.9 near Eardley, Quebec. |
| GEOSCAN ID | 326503 |
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