Simulations for the development of a ground motion model for induced seismicity in the Groningen gas field, the Netherlands
| Autor: | Julian J. Bommer, Benjamin Edwards, E. van Dedem, S. J. Oates, J. van Elk, B. Zurek, Peter J. Stafford, B. deMartin |
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| Rok vydání: | 2018 |
| Předmět: |
Hazard (logic)
Technology PREDICTION Event (relativity) 0211 other engineering and technologies Context (language use) 02 engineering and technology Induced seismicity 010502 geochemistry & geophysics 01 natural sciences 0905 Civil Engineering Seismic hazard DAMPED PSA Engineering POINT-SOURCE Range (statistics) Engineering Geological Geosciences Multidisciplinary EQUATIONS Earthquake ground motion PROBABILISTIC HAZARD ASSESSMENT 0105 earth and related environmental sciences Civil and Structural Engineering 021110 strategic defence & security studies Hydrogeology Science & Technology Strategic Defence & Security Studies Geology Stochastic simulation EARTHQUAKES Building and Construction Geotechnical Engineering and Engineering Geology Geodesy AVERAGE HORIZONTAL COMPONENT FRAMEWORK Geophysics Amplitude Duration PGV 0403 Geology Physical Sciences Finite-difference simulation Reduction (mathematics) |
| Popis: | We present simulations performed for the development of a ground motion model for induced earthquakes in the Groningen gas field. The largest recorded event, with M3.5, occurred in 2012 and, more recently, a M3.4 event in 2018 led to recorded ground accelerations exceeding 0.1 g. As part of an extensive hazard and risk study, it has been necessary to predict ground motions for scenario earthquakes up to M7. In order to achieve this, while accounting for the unique local geology, a range of simulations have been performed using both stochastic and full-waveform finite-difference simulations. Due to frequency limitations and lack of empirical calibration of the latter approach, input simulations for the ground motion model used in the hazard and risk analyses have been performed with a finite-fault stochastic method. However, in parallel, extensive studies using the finite-difference simulations have guided inputs and modelling considerations for these simulations. Three approaches are used: (1) the finite-fault stochastic method, (2) elastic point- and (3) finite-source 3D finite-difference simulations. We present a summary of the methods and their synthesis, including both amplitudes and durations within the context of the hazard and risk model. A unique form of wave-propagation with strong lateral focusing and defocusing is evident in both peak amplitudes and durations. The results clearly demonstrate the need for a locally derived ground motion model and the potential for reduction in aleatory variability in moving toward a path-specific fully non-ergodic model. |
| Databáze: | OpenAIRE |
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