To gain a better understanding of induced seismicity in northeast British Columbia and western Alberta, we conducted an intensive analysis of seismic data to locate earthquakes that occurred within the area of 52°N-61°N, 126°W-115°W for the years of 2014 through 2016. Continuous seismic waveforms from as many as 43 stations operated by various organizations in the region were used in this study. A total of 5478 events were identified and located; but only 4916 solutions were deemed acceptable by our quality criteria. The number of earthquakes in our final catalogue is approximately three times the base level of the Canadian National Seismograph Network catalogue. In this report, we describe in detail our location procedures and how each source parameter (origin time, epicenter, focal depth, and magnitude) is determined. The earthquake catalogue is summarized in a table, while the phase picking data for individual events are presented in an ASCII file as a supplement to this report. The total numbers of events in 2014, 2015, and 2016 are 1287, 1575, and 2057, respectively. The overall magnitude of completeness of our catalogue is ML 1.8, an improvement from the value of 2.3 for the CNSN catalogue.
To gain a better understanding of induced seismicity in northeastern British Columbia, we conducted an analysis of seismic data to locate earthquakes that occurred within the area of 55.5°N-56.3°N and 119.8°W-121.2°W for the years of 2017 and 2018. This catalogue contains earthquakes that were detected and located using a combination of manual analysis and a semi-automated process utilizing the newly developed Seismicity-Scanning based on Navigated Automatic Phase-picking (S-SNAP) algorithm (Tan et al., 2019). There were two major seismic station deployments within the study area during the study period which significantly increased our ability to locate small earthquakes (ML <1.5). Our dataset consisted of continuous seismic waveforms from a total of 52 stations operated by various organizations in the region. A total of 10,692 events were identified, located, and had solutions which passed our quality control criteria. For the same period and area, the Canadian National Seismograph Network (CNSN) routine catalogue 71 events - all are included in this study. In this report, we describe in detail both the manual location procedures and our implementation of S-SNAP. The earthquake catalogue, picking information, and magnitude information are included in separate files and can easily be joined using the earthquake origin IDs. The total number of events in 2017 and 2018 are 5779 and 4914, respectively. The overall magnitude of completeness of our catalogue is ML ~1.5 for the period of 2017-01 through 2017-06, when there were only 2 stations within the study area, and ~ML 1.0 when there were 10 or more stations in the area from 2017-07 onwards.
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