Jagdish Chandra Vyas

SM Seismology

The 2016 Outstanding Student Poster and PICO (OSPP) Award is awarded to Jagdish Chandra Vyas for the poster/PICO entitled:

Distance and azimuthal dependence of ground-motion variability (Chandra Vyas, J.; Mai, P.M.; Galis, M.)

Click here to download the poster/PICO file.

I am a PhD student at King Abdullah University of Science and Technology (KAUST). My research seeks to better understand effects of earthquake rupture propagation on ground-motion and its variability through numerical modeling. Particularly, I analyze influence of directivity effect, super-shear ruptures and medium scattering due to random heterogeneities present in the earth structure on ground-shaking. In the EGU 2016 poster, we analyzed distance and azimuthal dependence of the intra-event groundmotion variability for large-scale simulations of the 1992 Landers earthquake and scenario earthquake in Southern California. We found that ground-motion variability is higher in the near-field than what is a usually assumed in seismic hazard analysis and decreases as power law with increasing distance from the fault.