Relevant bibliographies by topics / Geomagnetic signatures

Academic literature on the topic 'Geomagnetic signatures'

Author: Grafiati
Published: 6 September 2023

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Journal articles on the topic "Geomagnetic signatures"

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Zerbo, Jean-Louis, Frédéric Ouattara, Christine Amory Mazaudier, Jean-Pierre Legrand, and John D. Richardson. "Solar Activity, Solar Wind and Geomagnetic Signatures." Atmospheric and Climate Sciences 03, no. 04 (2013): 610–17. http://dx.doi.org/10.4236/acs.2013.34063.

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Sutcliffe, P. R. "Modelling the Ionospheric Signatures of Geomagnetic Pulsations." Journal of geomagnetism and geoelectricity 46, no. 11 (1994): 1011–27. http://dx.doi.org/10.5636/jgg.46.1011.

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Kullen, A., S. Ohtani, and T. Karlsson. "Geomagnetic signatures of auroral substorms preceded by pseudobreakups." Journal of Geophysical Research: Space Physics 114, A4 (April 2009): n/a. http://dx.doi.org/10.1029/2008ja013712.

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Masci, F. "On the multi-fractal characteristics of the ULF geomagnetic field before the 1993 Guam earthquake." Natural Hazards and Earth System Sciences 13, no. 1 (January 29, 2013): 187–91. http://dx.doi.org/10.5194/nhess-13-187-2013.

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Abstract. Ida et al. (2005) document significant changes in the multi-fractal parameters of the ULF geomagnetic field H component starting about one month before the 1993 Guam earthquake. According to the authors, these multi-fractal signatures can be considered as precursory signals of the Guam earthquake. As a consequence, they conclude that the multi-fractal analysis may have an important role in the development of short-term earthquake prediction capabilities. Since this and other similar reports have motivated the idea that earthquake prediction based on electromagnetic precursory signals may one day become a routine technique, the presumed precursors need to be validated through independent datasets. In this review the seismogenic origin of the multi-fractal magnetic signatures documented by Ida et al. (2005) before the 8 August 1993 Guam earthquake is seriously put into question. By means of the geomagnetic ΣKp index, it is demonstrated that these multi-fractal parameter changes are normal signals induced by the variation of the global geomagnetic activity level.
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Alex, S., S. Mukherjee, and G. S. Lakhina. "Geomagnetic signatures during the intense geomagnetic storms of 29 October and 20 November 2003." Journal of Atmospheric and Solar-Terrestrial Physics 68, no. 7 (April 2006): 769–80. http://dx.doi.org/10.1016/j.jastp.2006.01.003.

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Olawepo, A. O., and J. O. Adeniyi. "Signatures of strong geomagnetic storms in the equatorial latitude." Advances in Space Research 53, no. 7 (April 2014): 1047–57. http://dx.doi.org/10.1016/j.asr.2014.01.012.

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Lam, H. L., D. H. Boteler, and L. Trichtchenko. "Case studies of space weather events from their launching on the Sun to their impacts on power systems on the Earth." Annales Geophysicae 20, no. 7 (July 31, 2002): 1073–79. http://dx.doi.org/10.5194/angeo-20-1073-2002.

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Abstract. Active geomagnetic conditions on 12–13, 15–16, and 22–23 September 1999 resulted in geomagnetically induced currents (GIC) measurable in power systems in Canada and the United States. Different solar origins for these three events gave rise to dissimilar interplanetary signatures. We used these events to present three case studies, each tracing an entire space weather episode from its inception on the Sun, propagation through the interplanetary medium, manifestation on the ground as intense magnetic and electric fluctuations, and its eventual impact on technological systems.Key words. Geomagnetism and paleomagnetism (rapid time variations) – Interplanetary physics (interplanetary magnetic fields) – Solar physics, astrophysics, and astronomy (flares and mass ejections)
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Rawat, R., S. Alex, and G. S. Lakhina. "Low-latitude geomagnetic signatures during major solar energetic particle events of solar cycle-23." Annales Geophysicae 24, no. 12 (December 21, 2006): 3569–83. http://dx.doi.org/10.5194/angeo-24-3569-2006.

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Abstract. The frequency of occurrence of disruptive transient processes in the Sun is enhanced during the high solar activity periods. Solar cycle-23 evidenced major geomagnetic storm events and intense solar energetic particle (SEP) events. The SEP events are the energetic outbursts as a result of acceleration of heliospheric particles by solar flares and coronal mass ejections (CMEs). The present work focuses on the geomagnetic variations at equatorial and low-latitude stations during the four major SEP events of 14 July 2000, 8 November 2000, 24 September 2001 and 4 November 2001. These events have been reported to be of discernible magnitude following intense X-ray flares and halo coronal mass ejections. Low-latitude geomagnetic records evidenced an intense main phase development subsequent to the shock impact on the Earth's magnetosphere. Satellite observations show proton-flux enhancements associated with solar flares for all events. Correlation analysis is also carried out to bring out the correspondence between the polar cap magnetic field perturbations, AE index and the variations of low-latitude magnetic field. The results presented in the current study elucidate the varying storm development processes, and the geomagnetic field response to the plasma and interplanetary magnetic field conditions for the energetic events. An important inference drawn from the current study is the close correspondence between the persistence of a high level of proton flux after the shock in some events and the ensuing intense magnetic storm. Another interesting result is the role of the pre-shock southward IMF Bz duration in generating a strong main phase.
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Martin, Jr., R. F., R. Fricke, and T. W. Speiser. "Modeled Particle Signatures of Magnetic Structures in the Geomagnetic Tail." Journal of geomagnetism and geoelectricity 48, no. 5 (1996): 809–19. http://dx.doi.org/10.5636/jgg.48.809.

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Masci, Fabrizio. "On claimed ULF seismogenic fractal signatures in the geomagnetic field." Journal of Geophysical Research: Space Physics 115, A10 (October 2010): n/a. http://dx.doi.org/10.1029/2010ja015311.

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Dissertations / Theses on the topic "Geomagnetic signatures"

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Calou, Paul. "Mesure et compensation de bâtiments navals à l’aide de capteurs magnétiques trois composantes." Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAH018.

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Cette thèse s’établit à la frontière du géomagnétisme et du magnétisme du navire, deux disciplines proches mais dont les habitudes diffèrent. Dans un premier temps, on présente les spécificités de chaque domaine en introduisant les principales notions clés ainsi que le type de mesure mis en oeuvre pour chaque domaine et les géométries d’acquisition. On vérifie également la validité des approximations utilisées dans les cas de figure rencontrés. Dans un deuxième temps (chapitre 2 et 3) on détaille le lien mathématique possible entre l’anomalie scalaire utilisée en géophysique et les trois composantes du champ d’anomalie. Le chapitre 4 résume les travaux expérimentaux réalisés, on présente le banc de test utilisé ainsi que les résultats obtenus sur données synthétiques et réelles pour la problématique de réglages des boucles d’immunisation. Dans le chapitre 5, une nouvelle approche concernant l’immunisation en boucle fermée pour un navire est présentée. On montre également un exemple de compensation réalisée sur un vrai navire à l’aide de capteurs embarqués. La thèse se termine avec le chapitre 6 qui est un article soumis à une revue scientifique synthétisant les problématiques de la thèse
This PhD thesis aims to apply geophysical practices to another magnetic branch which deals with ship’s signature and magnetization with different methods and habits. Firstly, we present the specificity and practices of each domain, introducing the key notions as well as the differences between each kind of measurement. We check the validity of the approximation corresponding to total-field magnetic anomalies in the particular case of our measurements. In a second time, chapter 2 and 3, a mathematical relation is demonstrated between the scalar anomaly and the three components of the anomaly field based on the equivalent layer method. Chapter 4 summarize the experimental work, focusing on the determination of the best electrical current to compensate the ship’s magnetic signature. The experimental system is presented as well as the main results obtained. In chapter 5, a new approach for closed loop degaussing system is presented, based on a compensation algorithm. We also show some results obtained thanks to the compensation with three-component magnetometers onboard a real ship. Chapter 6 corresponds to an article submitted to a scientific journal (IEEE) that summarize most of the problematics of the thesis
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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 opportunities to employ small to medium UAV with magnetometer applications. However, in comparison to manned aviation, small UAVs have smaller distance scales between sources of interference and sensors. Therefore, more robust magnetic characterization techniques are required specifically for UAVs. This characterization determined the most suitable position for the magnetometer payload by evaluating the aircraft’s static-field magnetic signature. For each aircraft component, the permanent and induced magnetic dipole moment characteristics were determined experimentally. These dipole characteristics were used to build three dimensional magnetic models of the aircraft. By assembling the dipoles in 3D space, analytical and numerical static-field solutions were obtained using MATLAB computational and COMSOL finite element analysis frameworks. Finally, Tolles and Lawson aeromagnetic compensation coefficients were computed and compared to evaluate the maneuver noise for various payload locations. The magnetic models were used to study the sensitivity of the aircraft configuration and to simultaneously predict the effects at potential sensor locations. The study concluded by predicting that a wingtip location was the area of lowest magnetic interference.
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Books on the topic "Geomagnetic signatures"

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Warm, Hartmut. Die Signatur der Sphären: Von der Ordnung im Sonnensystem. 2nd ed. Hamburg: Keplerstern Verlag, 2005.

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Signature Of The Celestial Spheres Discovering Order In The Solar System. Sophia Books, 2010.

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Book chapters on the topic "Geomagnetic signatures"

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Speiser, T. W., and R. F. Martin. "Neutral line energetic ion signatures in the geomagnetic tail: Comparisons with AMPTE observations." In Space Plasmas: Coupling Between Small and Medium Scale Processes, 243–53. Washington, D. C.: American Geophysical Union, 1995. http://dx.doi.org/10.1029/gm086p0243.

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Olsen, Nils, and Claudia Stolle. "Magnetic Signatures of Ionospheric and Magnetospheric Current Systems During Geomagnetic Quiet Conditions—An Overview." In Earth's Magnetic Field, 7–27. Dordrecht: Springer Netherlands, 2017. http://dx.doi.org/10.1007/978-94-024-1225-3_2.

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Øieroset, M., and P. E. Sandholt. "Auroral and Geomagnetic Signatures of Flux Transfer Events and Associated Current Systems for Positive and Negative IMF BY." In Polar Cap Boundary Phenomena, 209–18. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5214-3_16.

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Vassiliadis, D., A. J. Klimas, J. A. Valdivia, and D. N. Baker. "Substorm Expansion as Seen from the Ground: Models of the Geomagnetic Signature." In Substorms-4, 73–78. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-4798-9_14.

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Regi, Mauro, Marcello De Lauretis, Gianluca Redaelli, and Patrizia Francia. "ULF Geomagnetic Activity Signatures in the Atmospheric Parameters in Antarctica." In Antarctica - A Key To Global Change. IntechOpen, 2019. http://dx.doi.org/10.5772/intechopen.81106.

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Conference papers on the topic "Geomagnetic signatures"

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Gavrilyeva, Galina, Petr Ammosov, Anastasia Ammosova, Igor Koltovskoi, and Vera Sivtseva. "Geomagnetic activity signature in seasonal variations of mesopause temperature over Yakutia." In XXIII International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, edited by Oleg A. Romanovskii. SPIE, 2017. http://dx.doi.org/10.1117/12.2288710.

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