|Title||Numerical modelling and triggering mechanism of the largest hydraulic fracturing-induced earthquake in northeastern British Columbia, Canada (NTS 094B/16)|
|Author||Wang, B; Verdecchia, A; Kao, H; Harrington, R M; Liu, Y; Yu, H|
|Source||Geoscience BC summary of activities 2020: energy and water; Geoscience BC, Report 2021-02, 2021 p. 31-43 Open Access|
|Links||Online - En ligne|
|Alt Series||Natural Resources Canada, Contribution Series 20200571|
|Media||paper; on-line; digital|
|Lat/Long WENS||-122.3500 -122.0000 57.0500 56.8500|
|Subjects||geophysics; engineering geology; Nature and Environment; Science and Technology; Economics and Industry; seismology; earthquake mechanisms; earthquakes; earthquake risk; seismicity; seismic risk;
petroleum industry; hydraulic fracturing; modelling; computer simulations; bedrock geology; structural features; faults; pressure; stress analyses|
|Illustrations||location maps; sketch maps; focal mechanisms; tables; plots; 3-D models; time series; bar graphs; seismograms|
|Program||Environmental Geoscience Shale Gas - induced seismicity|
|Released||2021 01 01|
|Summary||(Plain Language Summary, not published)|
This is an invited article by Geoscience BC to provide a summary of the funded research work in 2020. In this study, we conduct numerical modeling of the
largest hydraulic fracturing-induced earthquake in Canada (the 17 August 2015 Mw 4.6 earthquake) to investigate its triggering mechanism. We conclude that the elastic stress perturbation from injection alone is not enough to cause this event.
Instead, pore pressure increase associated with fluid migration to the pre-existing fault, which took 5 days to complete, is most likely physical mechanism that triggered this event.