Articles | Volume 24, issue 5
https://doi.org/10.5194/nhess-24-1795-2024
https://doi.org/10.5194/nhess-24-1795-2024
Research article
 | 
23 May 2024
Research article |  | 23 May 2024

Modelling seismic ground motion and its uncertainty in different tectonic contexts: challenges and application to the 2020 European Seismic Hazard Model (ESHM20)

Graeme Weatherill, Sreeram Reddy Kotha, Laurentiu Danciu, Susana Vilanova, and Fabrice Cotton

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Cited articles

Abrahamson, N., Gregor, N., and Addo, K.: BC Hydro Ground Motion Prediction Equations for Subduction Earthquakes, Earthq. Spectra, 32, 23–44, https://doi.org/10.1193/051712EQS188MR, 2016. 
Abrahamson, N., Kuehn, N., Gulerce, Z., Gregor, N., Bozorgnia, Y., Parker, G., Stewart, J., Chiou, B., Idriss, L. M., Campbell, K., and Youngs, R. R.: Update of the BCHydro Subduction Ground-Motion Model Using the NGA-Subduction Dataset, Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, https://doi.org/10.55461/OYCD7434, 2018. 
Abrahamson, N. A. and Gulerce, Z.: Summary of the Abrahamson and Gulerce NGA-SUB ground-motion model for subduction earthquakes, Earthq. Spectra, 38, 2638–2681, https://doi.org/10.1177/87552930221114374, 2022. 
Abrahamson, N. A., Silva, W. J., and Kamai, R.: Summary of the ASK14 Ground Motion Relation for Active Crustal Regions, Earthq. Spectra, 30, 1025–1055, https://doi.org/10.1193/070913EQS198M, 2014. 
Akkar, S., Sandıkkaya, M. A., and Bommer, J. J.: Empirical ground-motion models for point- and extended-source crustal earthquake scenarios in Europe and the Middle East, B. Earthq. Eng., 12, 359–387, https://doi.org/10.1007/s10518-013-9461-4, 2014a. 
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Short summary
The ground motion models (GMMs) selected for the 2020 European Seismic Hazard Model (ESHM20) and their uncertainties require adaptation to different tectonic environments. Using insights from new data, local experts and developments in the scientific literature, we further calibrate the ESHM20 GMM logic tree to capture previously unmodelled regional variation. We also propose a new scaled-backbone logic tree for application to Europe's subduction zones and the Vrancea deep seismic source.
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