Preliminary ground motion model for subduction earthquakes based on NGA-Sub Japan database

Date

2018-06-28

Author

Gülerce, Zeynep

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This manuscript presents the preliminary ground motion model (GMM) for the subduction zone earthquakes based on the database collected from Japanese earthquakes within the frame of PEER Next Generation Attenuation: Subduction (NGA-Sub) project. The dataset used in the regression includes 5730 recordings from 56 subduction interface earthquakes with 5.16≤Mw≤9.13 and 4503 recordings from 27 intra-slab events with 5.2≤Mw≤8.32. Functional form of the model accommodates the differences in the depth and distance scaling for interface and intra-slab earthquakes. Both linear and non-linear site amplification factors and depth to the bedrock effects are incorporated in the model: linear site coefficient and depth to the bedrock scaling are estimated in regression; whereas the non-linear site amplification factors used in [1] are adopted. Magnitude dependent distance scaling and large magnitude scaling of the preliminary model is currently set equal to the BCHydro GMM [2], but will be re-evaluated using the global dataset of subduction events in the future. Median ground motions estimated by the preliminary model is approximately 20% higher than the median values given by the BCHydro GMM at the short period and 10% lower at the long periods.

URI

https://hdl.handle.net/11511/75873

Conference Name

11th National Conference in Earthquake Engineering, Integrating Science, Engineering & Policy(24-28 Haziran 2018)

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Department of Civil Engineering, Conference / Seminar

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Citation Formats

Z. Gülerce, “Preliminary ground motion model for subduction earthquakes based on NGA-Sub Japan database,” presented at the 11th National Conference in Earthquake Engineering, Integrating Science, Engineering & Policy(24-28 Haziran 2018), Los Angeles, California, 2018, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/75873.