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How Big is Too Big? Assessing Seismic Hazard and Hydraulic Fracture-Induced Seismicity
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Sixth EAGE Workshop on Passive Seismic, Jan 2016, Volume 2016, p.1 - 5
Abstract
Summary
Regulations governing induced seismicity in certain jurisdictions favour having "traffic light" systems where recommended responses are based on the magnitude of the induced events. The lower stress drops of induced seismicity cause less shaking than equivalent-magnitude tectonic events with higher stress releases. Because of this observation, and since seismic hazard is actually quantified in terms of probabilities of exceeding ground motion thresholds (not magnitude), we recommend that observed shaking should be the pertinent quantity to use to regulate seismicity during injections, and show how this is done in terms of emperical ground motion prediction equations.
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