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Estimating an Airborne Dipole Source Using 3D Wavefield Simulations and Seismic Stations on the Ground

Description: 

Acoustic signals can couple to the ground, and give an opportunity to use seismic stations to investigate airborne sources. The study of Bishop et al. (2022) used wavefield simulations in a fluid-solid medium to quantify the role of topography on the seismic (ground) recordings of a monopole source in the air. We build upon this study by linking the wavefield modeling with the source estimation code MTUQ, which can accommodate point forces (e.g., dipole in the air) or moment tensors (e.g, monopole in the air), as well as 1D or 3D Green’s functions. We perform a series of synthetic numerical experiments to demonstrate that a dipole airborne source can be estimated using ground-based stations, including within the presence of realistic topography. We explore the influence of station coverage, topography, and assumed source location on the estimated results. The established capabilities raise the prospects for future efforts to estimate moving dipole sources in 3D models that include 3D heterogeneity (in the air and solid) in addition to topography.

Session: Data-driven and Computational Characterization of Non-earthquake Seismoacoustic Sources - I

Type: Oral

Date: 4/16/2025

Presentation Time: 03:00 PM (local time)

Presenting Author: Amanda

Student Presenter: Yes

Invited Presentation: 

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