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- W2785962122 abstract "In response to the increasing concern of possible seismic risk due to injection operations during development of unconventional hydrocarbon resources, regulators in both British Columbia (BC) and Alberta (AB), Canada, have adopted varying aspects of a traffic light protocol as part of their individual oversight and risk mitigation strategies. In this study, we compare the regional seismicity pattern with the database of injection parameters to assess the performance of the individual induced seismicity traffic light protocols (IS-TLP). The red-light threshold in both BC and AB is set at local magnitude (M L ) = 4, which appears to be adequate in characterizing the potential seismic risk from induced earthquakes. Since 2014, there were three red-light events each in BC and AB, all related to hydraulic fracturing. In the three AB cases and one BC case, at least one 2 ≤ M L < 4 seismic event, characterized in AB as a yellow-light event, preceded the red-light event, suggesting that an IS-TLP based on escalating magnitude probably is more applicable to AB than BC. The average rate of background seismicity seems to be positively correlated with the rate of seismicity during injection in a qualitative sense. This observation illustrates that detailed knowledge on background seismicity may be a useful reference in forecasting the overall seismic response to injections. In some cases, once the earthquake sequence was induced, events would continue even after the hydraulic fracturing was completed. Therefore, this phenomenon of delayed triggering — i.e., earthquakes occurred after the completion of injection — can be a problem for the effectiveness of the IS-TLP and should be considered carefully. The existing magnitude-based IS-TLP can sometimes cause confusion due to the uncertainty of magnitude calculation. Specific changes can be made to improve the effectiveness of IS-TLP, including incorporation of ground-motion information, standardization of magnitude calculation, and making the IS-TLP more adaptive to local hazard conditions." @default.
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- W2785962122 date "2018-02-01" @default.
- W2785962122 modified "2023-10-12" @default.
- W2785962122 title "Performance assessment of the induced seismicity traffic light protocol for northeastern British Columbia and western Alberta" @default.
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- W2785962122 doi "https://doi.org/10.1190/tle37020117.1" @default.
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