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Comparison of Methods for Path Averaged Attenuated Travel Time Estimation using The Grid Search, Metropolis Algorithm, and Combined Method

Year: 2025

Type: conference-paper

Abstract: Attenuated travel time (t*) is one of the key parameters to estimate the seismic attenuation structure. The t* parameter quantifies the amplitude decay of seismic waves and is used as an input for the seismic attenuation tomography method. The Attenuation parameters could be estimated using a spectral fitting procedure from the amplitude spectra equation to obtain the corner frequency (fc), long-period spectral level (Ω0), and t* values for each pair of stations and events. We compared the grid search, metropolis, and combined algorithm for estimating the attenuation parameters with 15 predefined parameters synthetic data. The result showed that the combined method approach could estimate parameters better than the conventional hyperparameter inversion method (i.e., grid search, random search).

Source: IOP Conference Series Earth and Environmental Science

DOI: 10.1088/1755-1315/1458/1/012019

Authors: Theo Alvin Ryanto, Andri Dian Nugraha, Ade Surya Putra

Institutions: Bandung Institute of Technology, National Research and Innovation Agency

Language: English

Topic: Seismic Imaging and Inversion Techniques

Subfield: Geophysics

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: diamond

OpenAlex ID: W4407876728

FWCI: 17.62

Cites: 14

Cited by: 1

Related to: 10