Probabilistic Seismic Hazard Analysis of Nepal (original) (raw)

Probabilistic seismic hazard assessment of Nepal has been updated. Nepal has been divided into four area sources based upon density of historical earthquakes. At each sources, earthquake data has been collected from various sources. All data has been converted to moment magnitude, aftershocks and repeated events have been removed, and completeness analysis has been performed. Magnitude-frequency relationship has been developed. Entire area of Nepal has been divided into 1.2*0.6 degrees grid size. Earthquake densities are calculated based upon historical earthquakes using kernel estimation method which accounts the significance of both numbers of earthquakes and size. Considering various attenuation laws developed for subduction zone, peak ground acceleration and spectral acceleration for return period 475 years are calculated at 64 sites.

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