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Fiber seismic network on the Moon

Wenbo Wu, Zhongwen Zhan, Mark Panning and Andrew Klesh
Fiber seismic network on the Moon
Seismological Research Letters (February 2024) PRE-ISSUE PUBLICATION


Internal structures of the Moon are key to understanding the origin and evolution of the Earth-Moon system and other planets. The Apollo Passive Seismic Experiment detected thousands of lunar seismic events and vastly improved our understanding of the Moon's interior. However, some critical questions like the state and composition of the core remain unsolved largely due to the sparsity of the Apollo seismic stations and the strong scattering of seismic waves in the top layer of the Moon. In this study, we propose the concept of a fiber seismic network on the Moon and discuss its potential in overcoming the challenges in imaging deep Moon structures. As an emerging technique, distributed acoustic sensing (DAS) can provide a cost-efficient solution for large-aperture and dense seismic network deployment in harsh environments. We compute lunar synthetic seismograms and evaluate the performance of DAS arrays of different configurations in retrieving the hidden core reflected seismic phase ScS from the strong scattered waves. We find that, compared to a sparse conventional seismic network, a fiber seismic network using tens of kilometers of cable can dramatically increase the chance of observing clear ScS by array stacking. Our results indicate that DAS could provide new opportunities for the future lunar seismic surveys, but more efforts and further evaluations are required to develop a space-proof DAS.

ISSN: 0895-0695
EISSN: 1938-2057
Serial Title: Seismological Research Letters
Title: Fiber seismic network on the Moon
Affiliation: California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States
Published: 20240228
Text Language: English
Publisher: Seismological Society of America, El Cerrito, CA, United States
References: 69
Accession Number: 2024-022113
Categories: Extraterrestrial geologySeismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Secondary Affiliation: Jet Propulsion Laboratory, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2024, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2024
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