Academic literature on the topic 'Geomagnetic anomaly'

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Journal articles on the topic "Geomagnetic anomaly"

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Hasibuan, Jamaludin, Asdiati Berutu, Halimahtun Sakdiah, and Rahmatsyah Rahmatsyah. "Studi Penentuan Anomali Situs Purbakala di Tapanuli Tengah Dengan Metode Geomagnetik." Wahana Fisika 2, no. 1 (2017): 1. http://dx.doi.org/10.17509/wafi.v2i1.7040.

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Penelitian penentuan anomali magnetik situs arkeologi di Tapanuli Tengah dengan metode geomagnetik telah dilakukan untuk mengetahui adanya penampang anomali magnetik di lokasi Lobu Tua. Metode pengukuran Geomagnet menggunakan tipe PPM (Proton Precession Magnetometer) Elsec 770, pengambilan data dilakukan secara acak dengan jumlah titik yang diperoleh 51 titik pengukuran, pengolahan data menggunakan surfer 11 untuk mendapatkan peta kontur dan Mag2DC for windows. Hasil penelitian menunjukkan bahwa penyebaran struktur pelapis Lobu Tua menggunakan metode geomagnet menyebar secara vertikal dan hori
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Andriani, Fitria Dwi, Mimin Iryanti, and Indriana Lucky Sari. "Analisis Pola Waktu Mula Anomali Polarisasi Sinyal Sebelum Gempa Bumi Di Wilayah Aceh Dan Sumatera Utara." Wahana Fisika 2, no. 2 (2017): 54. http://dx.doi.org/10.17509/wafi.v2i2.9372.

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Telah dilakukan penelitian mengenai pola waktu mula anomali polarisasi sinyal geomagnet yang dapat dijadikan sebagai parameter dalam menentukan tanda atau gejala sebelum gempa bumi dengan menggunakan data komponen magnetik yang diperoleh dari pengamatan geomagnetik di Obsevatorim Badan Meteorologi Klimatologi Geofisika Tungtungan. Penelitian ini bertujuan untuk mengetahui pola waktu mula anomali polarisasi sebelum gempa bumi di wilayah Aceh dan Sumatera Utara terjadi. Gempa bumi yang di invertigasi merupakan gempa bumi yang terjadi di Sumatera Utara dan Aceh pada periode 2012-2015 dan memiliki
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Patmawidjaya, Tatang, and Subagio Subagio. "PENELITIAN GAYABERAT DAN GEOMAGNIT KEPULAUAN ARU, CEKUNGAN WOKAM." JURNAL GEOLOGI KELAUTAN 12, no. 1 (2016): 1. http://dx.doi.org/10.32693/jgk.12.1.2014.241.

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Paparan Arafura di bagian selatan Kepulauan Aru merupakan depresi Lempeng Indo-Australia yang ditunjukkan oleh anomali gayaberat dan geomagnet tinggi. Sedangkan depresi di bagian utara yang tertahan Palung Aru diperlihatkan oleh anomali gayaberat tinggi dan anomali geomagnet rendah. Anomali ini diduga sebagai penebalan batuan metamorf yang mengalami pangangkatan sebagai alas cekungan Wokam. Analisis data gayaberat dan geomagnet mengindikasikan penurunan cekungan ini ke arah utara. Penurunan anomali gayaberat ke arah Pulau Wokam yang berarah baratdaya-timurlaut di selatan dan baratlaut-tenggara
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Ahyar, Asep Saepul, and Bambang Sunardi. "KORELASI POLARISASI MAGNET Z/H UNTUK IDENTIFIKASI PREKURSOR GEMPA DI SEKITAR PELABUHAN RATU." Spektra: Jurnal Fisika dan Aplikasinya 2, no. 3 (2017): 179–86. http://dx.doi.org/10.21009/spektra.023.03.

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Abstrak
 Efek seismo-elektromagnetik yang berlangsung dalam rentang frekuensi luas yang mendahului gempa telah banyak dilaporkan dalam beberapa penelitian sebelumnya. Efek tersebut diharapkan dapat dimanfaatkan dalam mitigasi bencana gempa. Penelitian ini membahas penerapan metode korelasi polarisasi magnet komponen Z/H untuk mengidentifikasi prekursor gempa di sekitar Pelabuhan Ratu. Data yang dipergunakan adalah data magnet tiga komponen selama 31 hari sebelum kejadian gempa. Identifikasi anomali geomagnet dilakukan dengan menerapkan metode korelasi polarisasi magnet Z/H untuk menghitun
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Adrianto, Febri Adrianto, Refrizon, and Arif Ismul Hadi. "Model 2D of Subsurface Structures in the Dempo Magnetic Area of Pagar Alam City Using Geomagnetic Method." Jurnal Kumparan Fisika 6, no. 3 (2023): 167–76. http://dx.doi.org/10.33369/jkf.6.3.167-176.

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ABSTRAK Metode geomagnetik digunakan dalam penelitian ini untuk membuat model 2D struktur bawah permukaan di kawasan Dempo Magnet kota Pagar Alam berdasarkan sebaran anomali. Terdapat 48 titik pengukuran pada lokasi penelitian. Pengolahan data dilakukan dengan membuat peta anomali magnetik total. Koreksi diurnal dan koreksi international geomagnetic reference field (IGRF) dilakukan untuk mendapatkan nilai anomali magnetik total. Data magnetik tersebut kemudian diolah untuk memisahkan anomali regional dan anomali residual menggunakan bandpass filter, kemudian dilakukan transformasi reduksi ke k
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Maspupu, John, and Setyanto C. D. Pranoto. "MODEL PARSIAL HARI TENANG VARIASI MEDAN GEOMAGNET SEBAGAI FUNGSI HARI DALAM SETAHUN, USIA BULAN DAN WAKTU LOKAL DI STASION GEOMAGNET TONDANO." JURNAL GEOLOGI KELAUTAN 12, no. 1 (2016): 43. http://dx.doi.org/10.32693/jgk.12.1.2014.245.

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Penentuan suatu model parsial hari tenang variasi medan geomagnet di stasion geomagnet Tondano merupakan fungsi Date of Year (DOY), Lunar Age (LA), dan Local Time (LT). Diperoleh tiga model parsial hari tenang variasi medan geomagnet yaitu = g(DOY), = h(LA), dan = m(LT). Kontribusi dari DOY terhadap hari tenang variasi medan geomagnet sangatlah kecil (sebesar 0,784.10-3 %). Kontribusi faktor fisis lainnya diduga berperan terhadap hari tenang variasi medan geomagnet . Informasi hasil analisis model parsial variasi hari tenang terhadap usia bulan menunjukkan adanya anomali di sekitar lokasi peng
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Sarmili, Lili, and Lukman Arifin. "INDIKASI GUNUNGAPI BAWAH LAUT DI PERAIRAN SANGEANG SUMBAWA NUSA TENGGARA BARAT." JURNAL GEOLOGI KELAUTAN 13, no. 2 (2016): 75. http://dx.doi.org/10.32693/jgk.13.2.2015.263.

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Penelitian dengan menggunakan metode seismik pantul saluran ganda (multichannel) dan geomagnet mengindikasikan adanya gunungapi bawah laut. Dari penampang rekaman seismik dapat ditafsirkan bahwa Gunungapi bawah laut ditandai dengan bentuk tonjolan atau terobosan menembus dasar laut. Dari data megnetik kelautan diperoleh bahwa pada lokasi gunungapi bawah laut diketahui nilai anomali intensitas magnet total cukup tinggi yaitu sekitar 124 nT. Umumnya anomali intensitas magnet tinggi terdapat di bagian selatan daerah penelitian yang ditafsirkan juga sebagai penipisan kerak atau adanya Gunungapi ba
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Fazriyanti, Lina, Arif Tahjono, and Febty Febriani. "Analisis Anomali Sinyal Geomagnetik Menggunakan Metode Detrended Fluctuation Analysis Pada Gempa Bumi Magnitudo 6,1 di Lebak, Banten." Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics 3, no. 1 (2020): 53–60. http://dx.doi.org/10.15408/fiziya.v3i1.15091.

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Abstrak. Secara geografis Pulau Jawa berhadapan langsung dengan zona tumbukan lempeng Eurasia dan Indo-Australia yang menyebabkan wilayah tersebut rawan terjadinya gempa bumi, salah satunya gempa tersebut yaitu di Lebak, Banten dengan magnitudo 6,1. Maka diperlukan usaha untuk meminimalisir resiko gempa bumi, seperti pengamatan prediksi jangka pendek melalui fenomena medan magnetik bumi. Tujuan dari penelitian ini adalah untuk menganalisis apakah terdapat anomali sinyal geomagnetic Ultra Low Frequency (ULF) sebelum gempa bumi terjadi. Penelitian ini menggunakan data geomagnetik periode Januari
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Yu, Ziqiang, Mengchun Pan, Zhongyan Liu, Yujing Xu, Guanjie You, and Qi Zhang. "Research on magnetic anomaly detection method assisted by geomagnetic map." Journal of Physics: Conference Series 2486, no. 1 (2023): 012062. http://dx.doi.org/10.1088/1742-6596/2486/1/012062.

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Abstract Magnetic anomaly detection is a detection technology for underwater/underground ferromagnetic targets. In the geomagnetic anomaly area, the change of magnetic feld is very complicated, and the detection ability of traditional detection methods will decline sharply. To solve this problem, we construct a high-precision local geomagnetic map, which turns geomagnetic anomalies into known prior information to assist detection. Firstly, the accuracy of local geomagnetic map is improved by the optimized variation function of interpolation algorithm and an efficient mapping strategy. Secondly
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Su, Wei. "Magnetic Anomaly Data Detection of Local Marine Geomagnetic Field Model considering Robust Trend Surface Scientific Calculation Algorithm." Scientific Programming 2022 (May 9, 2022): 1–10. http://dx.doi.org/10.1155/2022/4055976.

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As a momentous part of marine data detection, modeling the marine geomagnetic field and detecting its magnetic data have momentous theoretical and practical value for obtaining its geomagnetic field parameters and characteristic distribution and then carrying out marine environment research. The detection of magnetic anomaly data of local marine geomagnetic field model has become a momentous prerequisite for obtaining key parameter info of local ocean and subsequent development and utilization. On account of this, this paper first analyzes the detection of local marine geomagnetic anomaly data
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Dissertations / Theses on the topic "Geomagnetic anomaly"

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Salomoni, Christiane da Silva Santos. "GPS e ionosfera: estudo do comportamento do TEC e de sua influência no posicionamento com GPS na região brasileira em períodos de alta e baixa atividade solar." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/15752.

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A ionosfera é uma das principais fontes de erro sistemático das observáveis GPS (Global Positioning System - Sistema de Posicionamento Global), pois, por ser um meio dispersivo, ela afeta a propagação de ondas eletromagnéticas, fazendo com que a modulação e a fase das ondas portadoras transmitidas pelos satélites GPS sofram, respectivamente, um retardo e um avanço, o que, por sua vez, provoca um erro na distância medida entre o satélite e o receptor. Esse erro é inversamente proporcional ao quadrado da freqüência do sinal e diretamente proporcional ao TEC (Total Electron Content - Conteúdo Tot
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Hartmann, Gelvam Andre. "\"A Anomalia Magnética do Atlântico Sul: Causas e Efeitos\"." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/14/14132/tde-24072006-230811/.

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Este trabalho tem por objetivo descrever a Anomalia Magnética do Atlântico Sul (SAMA) utilizando os modelos para o período histórico (1600–1890) e também os modelos para o último século (DGRF e IGRF). Como a SAMA apresenta características de baixa intensidade do campo total e coincide com a região de intenso fluxo de partículas cósmicas, muitos problemas com objetos que orbitam a Terra (por exemplo, satélites) são detectados nessa região. São descritos os efeitos provocados pela SAMA em fenômenos espaciais. Através da análise dos modelos na forma de mapas, foram extraídos os dados de mínima in
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陳伯舫 and Pak-fong Chan. "Numerical investigations of the terrestrial conductivity anomaly undervarious geophysical conditions." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31231494.

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Chan, Pak-fong. "Numerical investigations of the terrestrial conductivity anomaly under various geophysical conditions /." [Hong Kong : University of Hong Kong], 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12428577.

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Torres, John C. "Geomagnetic Compensation for Low-Cost Crash Avoidance Project." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/492.

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The goal of this work was to compensate for the effects of the Earth’s magnetic field in a vector field magnetic sensor. The magnetic sensor is a part of a low-cost crash avoidance system by Stephane Roussel where the magnetic sensor was used to detect cars passing when it was mounted to a test vehicle. However, the magnetic sensor’s output voltage varied when it changed orientation with respect to the Earth’s magnetic field. This limited the previous work to only analyze detection rates when the test vehicle travelled a single heading. Since one of the goals of this system is to be low-co
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Tominaga, Masako. "M-anomaly Analyses and its implications for the architecture of the upper oceanic crust." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-279.

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My dissertation research consists of two themes: (a) the analysis of Middle Jurassic - Early Cretaceous marine magnetic anomalies (M-anomalies) in order to construct a comprehensive geomagnetic polarity timescale and (b) the investigation of the upper oceanic crustal architecture using downhole geophysical logs. These themes were chosen to better understand how remotely-sensed geophysical signals elucidate the formation and evolution of oceanic crust. This revised Pacific-wide MGPTS model shows significant improvement in its reliability, exhibits global applicability, and highlights changes in
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Fon, Lawrence Teku. "Magnetotellurics and Geomagnetic Depth Sounding in Queensland, South Eastern Australia -Evidence for the Tasman Line?" Doctoral thesis, 2011. http://hdl.handle.net/11858/00-1735-0000-0006-B538-D.

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Hansen, Cody Robert Daniel. "Magnetic signature characterization of a fixed-wing vertical take-off and landing (VTOL) unmanned aerial vehicle (UAV)." Thesis, 2018. https://dspace.library.uvic.ca//handle/1828/10413.

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The use of magnetometers combined with unmanned aerial vehicles (UAVs) is an emerging market for commercial and military applications. This study presents the methodology used to magnetically characterize a novel fixed-wing vertical take-off and landing (VTOL) UAV. The most challenging aspect of integrating magnetometers on manned or unmanned aircraft is minimizing the amount of magnetic noise generated by the aircraft’s onboard components. As magnetometer technology has improved in recent years magnetometer payloads have decreased in size. As a result, there has been an increase in opportunit
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Books on the topic "Geomagnetic anomaly"

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J, Berktold A., and Commission of the European Communities. Directorate-General for Science, Research and Development., eds. Investigation of the geothermal anomaly of Travale/Tuscany by telluric, magnetotelluric and geomagnetic deep sounding measurements. Commission of the European Communities, 1986.

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C, Jachens Robert, and Geological Survey (U.S.), eds. Preliminary aeromagnetic anomaly map of California. U.S. Geological Survey, 1999.

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Orlova, L. I. Vysokochastotnye anomalii magnitnogo poli︠a︡ Zapadnoĭ Sibiri. Zapadno-sibirskiĭ NII geologii i geofiziki, 2012.

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R, Gidley Peter, ed. Investigation of the characteristics and source of the Magnetic Ridge magnetic anomaly, Cobar, NSW. Published for the Bureau of Mineral Resources, Geology and Geophysics by the Australian Government Publishing Service, 1986.

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E, Sauer Peter, and Geological Survey (U.S.), eds. Interpretation of magnetic maps of the northern Gulf of Alaska, with emphasis on the source of the slope anomaly. U.S. Geological Survey, 1990.

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Oganesi͡an, S. R. Lokalʹnye anomalii geomagnitnogo poli͡a kak vozmozhnye predvestniki zemletri͡aseniĭ. Izd-vo AN Armi͡anskoi SSR, 1990.

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Albrecht, Hahn, and Homilius Joachim, eds. Die Magnetische Anomalie Kirchzarten: Geologisch-tektonischer Rahmen, geophysikalische Untersuchungen und Ergebnisse der Forschungsbohrung Kirchzarten 3. Bundesanstalt für Geowissenschaften und Rohstoffe und den Geologischen Landesämtern in der Bundesrepublik Deutschland, 1985.

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Book chapters on the topic "Geomagnetic anomaly"

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Yusof, Khairul Adib, Mardina Abdullah, and Nurul Shazana Abdul Hamid. "Geomagnetic Signal Processing System for Pre-earthquake Anomaly Detection." In International Handbook of Disaster Research. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-16-8800-3_47-1.

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Yusof, Khairul Adib, Mardina Abdullah, and Nurul Shazana Abdul Hamid. "Geomagnetic Signal Processing System for Pre-earthquake Anomaly Detection." In International Handbook of Disaster Research. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-8388-7_47.

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Bondar, Kseniia M., Yurii Yu Bashkatov, Ruslan V. Khomenko, Serhii V. Didenko, Iryna V. Tsiupa, and Serhii A. Popov. "Geophysical Survey in Support of Archaeological Rescue Excavations at Industrial Area of Kremenchuk Magnetic Anomaly in Ukraine." In One World Archaeology. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-57900-4_18.

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AbstractThis study represents results of first archaeo-geophysical prospection at the area of Kremenchuk Magnetic Anomaly (Poltava region, Ukraine). Pre-excavation magnetometer survey, electrical resistivity tomography (ERT) and ground-penetrating radar (GPR) measurements were performed on archaeological sites which are planned to be destroyed in near future due to development of iron ore quarries and construction of mine sites. Investigated archaeological monuments comprise settlements and burial mounds—kurgans—dated to Bronze and Early Iron Age occupying relatively high terrains in the flood
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Batista, Inez S., Erica M. Diogo, Jonas R. Souza, Mangalathayil Ali Abdu, and Graham J. Bailey. "Equatorial Ionization Anomaly: The Role of Thermospheric Winds and the Effects of the Geomagnetic Field Secular Variation." In Aeronomy of the Earth's Atmosphere and Ionosphere. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0326-1_23.

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Santis, A., D. J. Kerridge, and D. R. Barraclough. "A Spherical Cap Harmonic Model of the Crustal Magnetic Anomaly Field in Europe Observed by Magsat." In Geomagnetism and Palaeomagnetism. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-0905-2_1.

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Conference papers on the topic "Geomagnetic anomaly"

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Zhou, Yingying, Qijun Wang, Shuduo Zhao, Mingsheng Li, Zhichao Zeng, and Hang Liu. "Research on Precise Positioning Technology of Staged Fracturing Sleeve Based on Geomagnetic Anomaly Marking." In 2024 3rd International Symposium on Semiconductor and Electronic Technology (ISSET). IEEE, 2024. https://doi.org/10.1109/isset62871.2024.10779634.

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Makita, Kazuo, Masonori Nishino, N. J. Schuch, Hisao Takahashi, and Abdu Mangalathayil. "Typical Phenomena Observed In Brazilian Geomagnetic Anomaly Region." In 7th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 2001. http://dx.doi.org/10.3997/2214-4609-pdb.217.437.

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Zhang, Tao, Xinhua Wang, Yingchun Chen, Zia Ullah, and Yizhen Zhao. "Non-Contact Geomagnetic Localization of Pipeline Defects Using Empirical Mode Decomposition and Magnetic Gradient Tensor." In 2018 12th International Pipeline Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/ipc2018-78258.

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Non-contact geomagnetic anomaly detection, as one of passive non-destructive testing (NDT) techniques, can be used to locate pipeline defects, while its accuracy is affected by random noise and detection orientation. In order to extract effective geomagnetic anomaly signals of pipeline defects, a method based on empirical mode decomposition (EMD) and magnetic gradient tensor was studied. In order to filter random noise, EMD was performed to self-adaptively decompose magnetic field signals into a series of intrinsic mode functions (IMFs), and then Hurst exponent was implemented to exclude false
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Yu, Huang, and Wu Li-Hua. "Underwater Localization Iterative Algorithm based on Geomagnetic Anomaly Inversion." In 2012 International Conference on Industrial Control and Electronics Engineering (ICICEE). IEEE, 2012. http://dx.doi.org/10.1109/icicee.2012.186.

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Kikuchi, T., K. Makita, S. Okano, N. Schuch, and H. Takahashi. "Upper Atmospheric Observations in the Brazilian Geomagnetic Anomaly Region." In 5th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 1997. http://dx.doi.org/10.3997/2214-4609-pdb.299.354.

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Tian, Bin, Chen Yang, Yong Ming, and Han Yu Hong. "Research on Underwater Ferromagnet Positioning Method of Geomagnetic Anomaly." In 2023 42nd Chinese Control Conference (CCC). IEEE, 2023. http://dx.doi.org/10.23919/ccc58697.2023.10240890.

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Sampaio, Júlia, Elder Yokoyama, and Luciana Prado. "Analysis of geomagnetic storms in South Atlantic Magnetic Anomaly (SAMA)." In International Congress of the Brazilian Geophysical Society&Expogef. Brazilian Geophysical Society, 2019. http://dx.doi.org/10.22564/16cisbgf2019.036.

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Trivedi, Nalin B., Rajaram P. Kane, Severino L. G. Dutra, and Nelson J. Schuch. "Geomagnetic storm-time variations in the South Atlantic Anomaly Region." In 9th International Congress of the Brazilian Geophysical Society & EXPOGEF, Salvador, Bahia, Brazil, 11-14 September 2005. Society of Exploration Geophysicists and Brazilian Geophysical Society, 2005. http://dx.doi.org/10.1190/sbgf2005-403.

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Makita*, K., M. Hoshino, Y. Tanaka, et al. "Riometer observation in Geomagnetic Hole in South Atlantic Anomaly Region." In 11th International Congress of the Brazilian Geophysical Society & EXPOGEF 2009, Salvador, Bahia, Brazil, 24-28 August 2009. Society of Exploration Geophysicists and Brazilian Geophysical Society, 2009. http://dx.doi.org/10.1190/sbgf2009-377.

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Liang, Ying, Qingyang Xiu, and Yunfeng Bi. "Geomagnetic Anomaly Mapping by Multi-fractal Measure Kriging Interpolation Method." In the 2nd International Conference. ACM Press, 2018. http://dx.doi.org/10.1145/3291801.3291824.

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