Electromagnetic Source Localization of the Cultural Noise in MT Data

MT 탐사자료에 나타나는 전자기적 인공잡음의 송신원 위치 추정

  • Lee, Choon-Ki (Groundwater & Geothermal Resources Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Kwon, Byung-Doo (Dept. of Earth Science Education, Seoul National University) ;
  • Song, Yoon-Ho (Groundwater & Geothermal Resources Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Tae-Jong (Groundwater & Geothermal Resources Division, Korea Institute of Geoscience and Mineral Resources)
  • 이춘기 (한국지질자원연구원 지하수지열연구부) ;
  • 권병두 (서울대학교 지구과학교육과) ;
  • 송윤호 (한국지질자원연구원 지하수지열연구부) ;
  • 이태종 (한국지질자원연구원 지하수지열연구부)
  • Published : 2007.11.30

Abstract

Magnetotelluric data recorded in the middle part of the Korean Peninsula are contaminated by severe noises at dead-band frequencies. In this study, we estimated the location of noise source using a source localization method. Since conventional beamforming techniques were not adequate for the localization of electromagnetic sources, we used the matched field processing and a genetic algorithm. The solutions for the strong noise signals tend to be localized in a narrow area, whereas those for natural MT signals shows randomly distributed patterns. The strong noise sources are mainly located in the western part of Kyonggi-do.

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