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2024 Vol.40, Issue 6 Preview Page
Acquisition of Moonquake Seismograms from the Apollo Program and Characterization of Shallow Moonquake Spectrum Patterns

아폴로 프로그램 월진파 확보 및 얕은 월진 스펙트럼 형상 정형화

Hyung-Ik Cho1
,
Jin-Tae Han2
,
Jongkwan Kim3
,
Seokjung Kim4*
조 형익1
,
한 진태2
,
김 종관3
,
김 석중4*
1Member, Research Fellow, Dept. of Civil Systems Engineering, Andong National Univ.
2Member, Research Fellow, Dept. of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology
3Member, Senior Researcher, Dept. of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology
4Member, Senior Researcher, Dept. of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology
1정회원, 국립안동대학교 건설시스템공학과 조교수
2정회원, 한국건설기술연구원 지반연구본부 연구위원
3정회원, 한국건설기술연구원 지반연구본부 수석연구원
4정회원, 한국건설기술연구원 지반연구본부 수석연구원
*Corresponding Author
31 December 2024. pp. 101-110
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Abstract

This study aims to analyze the characteristics of shallow moonquakes on the lunar surface using Apollo lunar seismic experiment data and develop a ground motion spectrum, which are essential for the seismic design of lunar base construction. Raw moonquake data, which were converted to modern seismological standard data formats, were utilized in this study, and high-quality moonquake waveforms were collected selectively based on the signal-to-noise ratio and logistic regression analyses. Ultimately, 82 waveforms from 16 shallow moonquake events were obtained. The vertical ground motion spectra were derived, and a ground motion spectrum for conservative design purposes is proposed. The vertical-to-horizontal spectral ratios were also analyzed to determine the possible horizontal spectral characteristics; however, due to data limitations, clear conclusions could not be drawn. The moonquake waveform data and findings of this study are expected to serve as foundational data for seismic design in the lunar environment and contribute to lunar base construction utilizing in situ resource utilization technology.

Keywords
Apollo program
Lunar Seismic Data
Response Spectrum
Seismic Design
Shallow Moonquakes

본 연구는 아폴로 월진 실험 데이터를 활용하여 달에서 발생하는 얕은 월진의 특성을 분석하고, 달 기지 건설을 위한 내진설계에 필요한 지반운동 스펙트럼을 정형화하는 것을 목표로 하였다. 이를 위해 현대 지진학의 표준 데이터 형식으로 변환된 원시 월진 데이터를 활용하였으며, 신호대잡음비와 로지스틱 회귀분석 수준을 고려하여 고품질의 월진 파형을 선별하였다. 최종적으로 16회의 얕은 월진 이벤트에서 82건의 월진 파형을 확보하였다. 확보된 파형을 바탕으로 지반운동 스펙트럼을 도출하고, 보수적인 설계를 위한 수직 지반운동 스펙트럼을 제시하였다. 또한, 수직/수평 스펙트럴 비를 분석하여 수평 스펙트럼 형상의 결정 가능성을 모색하였다. 다만, 데이터 제한으로 인해 명확한 결론 도출에는 일부 한계가 존재하였다. 본 연구에서 확보한 월진 파형 데이터와 연구 결과는 달 환경에서의 내진설계에 유용한 기초 자료로 활용될 수 있으며, 향후 달 현지 자원 활용 기술에 기초한 달 기지 건설에 일부 역할을 할 것으로 기대된다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 40
  • No :6
  • Pages :101-110
  • Received Date : 2024-11-25
  • Revised Date : 2024-12-04
  • Accepted Date : 2024-12-04
  • DOI :https://doi.org/10.7843/kgs.2024.40.6.101
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