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Electromagnetic Source Localization of the Cultural Noise in MT Data  

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)
Publication Information
Geophysics and Geophysical Exploration / v.10, no.4, 2007 , pp. 285-292 More about this Journal
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.
Keywords
magnetotellurics; artificial noise; source localization; genetic algorithm;
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Times Cited By KSCI : 3  (Citation Analysis)
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