The Aleatory Variability of Response Spectrum Amplitude Near the Seismic Source Based on a Single-Site Ground Motion Model for Crustal Earthquakes in Japan

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This study aims to assess the aleatory variability of response spectrum amplitudes near seismic sources in Japan and its dependence on various factors.
Evaluated seismic response using a single-site ground motion model for inland crustal earthquakes in Japan.
Analyzed residuals between predicted and observed ground motion values to assess variability.
Investigated the dependency of variability on source distance, period, and type of deviation.
Found that aleatory variability increases closer to the seismic source.
Identified that trends in variability differ based on the type of deviation from expected patterns.
Provided insights into enhancing the precision of ground motion assessments near sources.

Evaluates ground motion variability in crustal earthquakes, suggesting improved seismic assessment methods.

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Shiota et al. (2026) studied this question.

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