Assessment of seismic hazard near faults of uncertain type: Inter-plate versus intra-plate |
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Authors: | Gideon Leonard David M Steinberg Nitzan Rabinowitz |
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Institution: | (1) Israel Atomic Energy Commission, Licensing Division, Box 7061, Tel Aviv, Israel;(2) Department of Statistics and OR, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Ramat-Aviv, Israel;(3) Institute for Petroleum Research & Geophysics, Box 2286, Holon, Israel |
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Abstract: | Maximum magnitude is an important input parameter in seismic hazard analysis, but may be difficult to determine directly on the basis of available seismological data. Moreover, there is evidence that the scaling law relating maximum magnitude to fault length for inter-plate faults may differ from the law for intra-plate faults. Thus uncertainty as to the fault type can complicate the problem of determining maximum magnitude. We present a method for examining the implications for seismic hazard analysis of uncertainty regarding fault type. We apply the method to a simple constructed example and find that the problem of assessing fault type can be far more critical to the hazard assessment than the exact statement of fault geometry, especially for sites that are distant from the fault.The opinions and conditions presented in this paper do not neccessarily reflect the official position of the Licensing Division of the Israel Atomic Energy Commission. |
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Keywords: | Fault geometry multiparameter method probabilistic hazard assessment scaling laws sensitivity analysis |
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