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Shallow S wave Velocity Profile from Active Source Seismic Data at the Apollo 14 Landing Site Based on Virtual Multichannel Analysis of Surface Waves
  • Hikaru Imazato,
  • Tatsunori Ikeda,
  • Takeshi Tsuji
Hikaru Imazato
Kyushu University
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Tatsunori Ikeda
Kyushu University
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Takeshi Tsuji
University of Tokyo

Corresponding Author:tsuji@sys.t.u-tokyo.ac.jp

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We used active source seismic data at the Apollo 14 landing site to investigate the shallow S wave velocity structure of the Moon. We applied seismic interferometry to data from shots located between two geophones to construct a virtual shot gather for multichannel analysis of surface waves (MASW). We included continuous wavelet transform processing in the MASW analysis to improve the signal-to-noise ratio of the data before estimating the S wave velocity profile. The resultant profile showed a regolith layer (VS = 50–70 m/s, ~3 m thick) underlain by a harder layer (VS > 70 m/s to at least 10 m depth), similar to the profile at the Apollo 17 site. This study demonstrated that future extraterrestrial active shallow seismic surveys can be accomplished faster, with simpler field geometry, and using fewer shots and receivers than past missions, thus reducing the payload and cost of future extraterrestrial exploration missions.
04 Mar 2023Submitted to ESS Open Archive
06 Mar 2023Published in ESS Open Archive