Ground Motion Prediction Equation (GMPE) for the Intraslab Subduction Earthquakes of North East India (NEI) and Its Surrounding Region using Seismological Model

Date: 4/25/2019

Time: 06:00 PM

Room: Grand Ballroom

In this study, a new ground motion prediction equation (GMPE) is developed for intraslab subduction earthquakes for North-East India (NEI) and its surrounding region for the first time. We used seismological model in deriving our proposed ground motion equation. Recorded strong motion data for intraslab earthquakes in NEI are very sparse. With these sparse recorded events in NEI, it is not possible to developed robust ground motion prediction equation and so, we used seismological model to developed new ground motion prediction equation. In total in this study for NEI, 33,000 ground motion samples have been simulated incorporating the different key seismic parameters namely stress drop, quality factor, path parameter and attenuation model for different earthquake magnitude (M_w) 5.0-9.0 and epicentral distance 30 Km -300 Km. Sensitivity analysis has also been performed in this study to check the biasness of each key seismic input parameters used in developing the ground motion prediction equation.

We have compared and validated our model with the existing recorded events. We have also checked our model with the similar ground motion prediction equations developed for subduction zone intraslab earthquake in the world.

Presenting Author: Jamal Ghosh

Authors