| Title | A comprehensive earthquake catalogue for northeastern British Columbia: the northern Montney trend from 2017 to 2020 and the Kiskatinaw Seismic Monitoring and Mitigation Area from 2019 to 2020 |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Visser, R; Kao, H ; Dokht, R M H; Mahani, A B; Venables, S |
| Source | Geological Survey of Canada, Open File 8831, 2021, 20 pages, https://doi.org/10.4095/329078  Open Access |
| Image |  |
| Year | 2021 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is related to the following
publications |
| File format | readme
|
| File format | pdf; rtf; xlsx (Microsoft® Excel®) |
| Province | British Columbia; Alberta |
| NTS | 83M/12; 83M/13; 84D/04; 84D/05; 84D/12; 84D/13; 84E/04; 84E/05; 84E/12; 84E/13; 84L/04; 84L/05; 84L/12; 84L/13; 84M/04; 84M/05; 84M/12; 84M/13; 93O/09; 93O/10; 93O/11; 93O/14; 93O/15; 93O/16; 93P/09; 93P/10;
93P/11; 93P/12; 93P/13; 93P/14; 93P/15; 93P/16; 94A; 94B/01; 94B/02; 94B/03; 94B/06; 94B/07; 94B/08; 94B/09; 94B/10; 94B/11; 94B/14; 94B/15; 94B/16; 94G/01; 94G/02; 94G/03; 94G/06; 94G/07; 94G/08; 94G/09; 94G/10; 94G/11; 94G/14; 94G/15; 94G/16; 94H;
94I; 94J/01; 94J/02; 94J/03; 94J/06; 94J/07; 94J/08; 94J/09; 94J/10; 94J/11; 94J/14; 94J/15; 94J/16; 94O/01; 94O/02; 94O/03; 94O/06; 94O/07; 94O/08; 94O/09; 94O/10; 94O/11; 94O/14; 94O/15; 94O/16; 94P |
| Area | Dawson Creek; Fort St. John |
| Lat/Long WENS | -123.7500 -119.7500 60.0000 55.5000 |
| Subjects | geophysics; fossil fuels; Economics and Industry; Science and Technology; Health and Safety; seismology; earthquakes; earthquake catalogues; seismicity; earthquake risk; seismic risk; seismological
network; seismographs; seismic methods; seismic data; seismic waves; seismic models; earthquake magnitudes; petroleum industry; hydrocarbon recovery; hydraulic fracturing; data base management systems; statistics; Montney Trend; Kiskatinaw Seismic
Monitoring and Mitigation Area; Western Canada Sedimentary Basin; Canadian National Seismograph Network; Methodology; monitoring; machine learning; Artificial intelligence; Databases; Quality control |
| Illustrations | location maps; geoscientific sketch maps; models; time series; histograms |
| Program | Environmental Geoscience Shale Gas - induced seismicity |
| Released | 2021 11 10 |
| Abstract | To increase our understanding of induced seismicity, we develop and implement methods to enhance seismic monitoring capabilities in northeastern British Columbia (NE BC). We deploy two different machine
learning models to identify earthquake phases using waveform data from regional seismic stations and utilize an earthquake database management system to streamline the construction and maintenance of an up-to-date earthquake catalogue. The completion
of this study allows for a comprehensive catalogue in NE BC from 2014 to 2020 by building upon our previous 2014-2016 and 2017-2018 catalogues. The bounds of the area where earthquakes were located were between 55.5°N-60.0°N and 119.8°W-123.5°W. The
earthquakes in the catalogue were initially detected by machine learning models, then reviewed by an analyst to confirm correct identification, and finally located using the Non-Linear Location (NonLinLoc) algorithm. Two distinct sub-areas within the
bounds consider different periods to supplement what was not covered in previously published reports - the Northern Montney Trend (NMT) is covered from 2017 to 2020 while the Kiskatinaw Seismic Monitoring and Mitigation Area (KSMMA) is covered from
2019 to 2020. The two sub-areas are distinguished by the BC Oil & Gas Commission (BCOGC) due to differences in their geographic location and geology. The catalogue was produced by picking arrival phases on continuous seismic waveforms from 51
stations operated by various organizations in the region. A total of 17,908 events passed our quality control criteria and are included in the final catalogue. Comparably, the routine Canadian National Seismograph Network (CNSN) catalogue reports 207
seismic events - all events in the CNSN catalogue are present in our catalogue. Our catalogue benefits from the use of enhanced station coverage and improved methodology. The total number of events in our catalogue in 2017, 2018, 2019, and 2020 were
62, 47, 9579 and 8220, respectively. The first two years correspond to seismicity in the NMT where poor station coverage makes it difficult to detect small magnitude events. The magnitude of completeness within the KSMMA (ML = ~0.7) is significantly
smaller than that obtained for the NMT (ML = ~1.4). The new catalogue is released with separate files for origins, arrivals, and magnitudes which can be joined using the unique ID assigned to each event. |
| Summary | (Plain Language Summary, not published)
To increase our understanding of induced seismicity, we develop and implement methods to enhance seismic monitoring capabilities in northeastern British
Columbia. Two different machine-learning based methods are used to identify earthquake phases. An improved earthquake database management system is used to streamline the construction and maintenance of an up-to-date earthquake catalogue. As a
result, we build a comprehensive catalogue for two enhanced monitoring areas in BC from 2014 to 2020 by building upon our previous 2014-2016 and 2017-2018 catalogues. The catalogue was produced by picking arrival phases on continuous seismic
waveforms from 51 stations operated by various organizations in the region. A total of 17,908 events passed our quality control criteria and are included in the final catalogue. Comparably, the routine Canadian National Seismograph Network (CNSN)
catalogue reports 207 seismic events. |
| GEOSCAN ID | 329078 |
|
|