Induced seismicity red-light thresholds for enhanced geothermal prospects in the Netherlands

Journal article (2022)

Authors

Ryan Schultz Stanford University
A.G. Muntendam-Bos Applied Geology - CEG , Staatstoezicht op de Mijnen
W. Zhou Applied Geology - CEG
Gregory C. Beroza Stanford University
William L. Ellsworth Stanford University
Research Group
Applied Geology (CEG) (TU Delft)
Copyright: © 2022 Ryan Schultz, A.G. Muntendam-Bos, W. Zhou, Gregory C. Beroza, William L. Ellsworth
DOI
help_outline
https://doi.org/10.1016/j.geothermics.2022.102580
Seismic risk Induced seismicity Enhanced geothermal systems Red-light Seismic hazard Traffic light protocols
More Info
expand_more

Published Date

2022

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Civil Engineering & Geosciences

Department

Geoscience and Engineering

Research Group

Applied Geology

Abstract

Prospects for geothermal energy in the Netherlands have renewed concerns around induced earthquakes. Risks from induced earthquakes are managed by traffic light protocols (TLPs), where the red-light is chosen as the stop-point before exceeding a tolerance to risk. Here, we simulate post-shut-in earthquake scenarios based on realistic information for the Netherlands. We focus on three risk metrics: aggregates like nuisance and damage impacts and also local personal risk (LPR) – a likelihood of building collapse fatality for an individual. Our results show that the severity of these risks varies spatially by orders of magnitude. Prior induced seismicity (e.g., the 2012 Huizinge event) provides a reference baseline to calibrate the Dutch earthquake risk tolerances. We find that these calibrated risk tolerances are similar to those observed in North America, suggesting an underlying sociological ‘license to operate.’ Furthermore, the use of calibrated risk tolerances results in nuisance concerns completely eclipsing the other two metrics. We compare our results to a hypothetical Groningen geothermal operation and find that our approach sets red-light thresholds approximately one magnitude unit below the ML 3.6 Huizinge event. Overall, our results provide a first-order recommendation for red-light thresholds and proactive management of Dutch enhanced geothermal induced seismicity.