Generating Artificial Tsunami Waveforms Using Statistical Method

Abstract

To assist the advancement of tsunami risk assessment methods for nuclear power plants, requirements for the generation of artificial tsunami waveforms crucial for close cooperation between the probabilistic tsunami hazard analysis and tsunami fragility analysis were first listed. Then, basic studies were conducted to model the phase and amplitude spectra of waveforms observed during the 2011 Tohoku earthquake tsunami. Consequently, the average values of the group delay times and amplitude spectrum for each period band were confirmed to be effective for each modeling. Finally, in accordance with these requirements and results of the basic studies, a technique for generating artificial tsunami waveforms using a statistical method was proposed.