Abstract
Early theoretical studies of geomagnetic pulsations dealt with the oscillation of individual magnetic lines of force in the toroidal mode. In recent years it has become increasingly clear that the pulsations are organized in the azimuthal direction so that treatment of an oscillating surface of field lines may need to be considered rather than oscillations of individual field lines. In this paper evidence for the azimuthal dependence of Pc 4, 5 pulsation characteristics will be presented. In addition, the latitudinal characteristics of the ground perturbation pattern and the local time variation of these pulsations will be discussed in the context of some of the source mechanisms proposed for long period micropulsation activity.
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References
Chen, L. and A. Hasegawa, A theory of long-period magnetic pulsations, 1. Steady state excitation of field line resonance, J. Geophys. Res., 79, 1024–1032, 1974a.
Chen, L. and A. Hasegawa, A theory of long-period magnetic pulsations, 2. Impulse excitation of surface eigenmode, J. Geophys. Res., 79, 1033–1037, 1974b.
Dungey, J. W., Electrodynamics of the outer atmosphere, Ionos. Res. Lab. Sci. Rept., 69, Pennsylvania State Univ., 1954.
Green, C. A., The longitudinal phase variation of mid-latitude Pc 3–4 micropulsations, Planet. Space Sci., 24, 79–85, 1976.
Gupta, J. C., Some characteristics of large amplitude Pc 5 pulsation, Aust. J. Phys., 29, 67–79, 1976.
Herron, T. J., Phase characteristics of geomagnetic micropulsations, J. Geophys. Res., 71, 871–889, 1966.
Hughes, W. J., R. L. McPherron, and J. N. Barfield, Geomagnetic pulsations observed simultaneously on three geostationary satellites, J. Geophys. Res., 83, 1109–1116, 1978.
Jacobs, J. A. and K. O. Westphal, Geomagnetic micropulsations, in Physics and Chemistry of the Earth, Vol. 5, edited by L. H. Ahrens, F. Press, and S. K. Runcorn, 157 pp., The McMillan Company, New York, 1964.
Jacobs, J. A., Y. Kato, S. Matsushita, and V. A. Troitskaya, Classification of geomagnetic micro-pulsations, J. Geophys. Res., 69, 180–181, 1964.
Kato, Y. and T. Utsumi, Polarization of the long period geomagnetic pulsation Pc 5, Rept. Ionos. Space Res. Japan, 18, 214–217, 1964.
Kawasaki, K. and G. Rostoker, Perturbation magnetic fields and current systems associated with eastward drifting auroral structure, J. Geophys. Res., 84, 1464–1480, 1979.
Lam, H.-L. and G. Rostoker, The relationship of Pc 5 micropulsation activity in the morning sector to the auroral westward electrojet, Plant. Space Sci., 26, 473–492, 1978.
Olson, J. V. and G. Rostoker, Longitudinal phase variation of Pc 4–5 micropulsations, J. Geophys. Res., 83, 2481–2488, 1978.
Rostoker, G. and H.-L. Lam, A generation mechanism for Pc 5 micropulsations in the morning sector, Planet. Space Sci., 26, 493–515, 1978.
Rostoker, G., H.-L. Lam, and J. V. Olson, PC 4 giant pulsations in the morning sector, J. Geophys. Res., 84, 5153–5166, 1979.
Samson, J. C., Three-dimensional polarization characteristics of high-latitude Pc 5 geomagnetic micro- pulsations, J. Geophys. Res., 77, 6145–6160, 1972.
Samson, J. C. and J. V. Olson, Data adaptive polarization filters for multichannel geophysical data, Geophysics, submitted, 1980.
Samson, J. C. and G. Rostoker, Latitude-dependent characteristics of high-latitude Pc 4 and Pc 5 micro- pulsations, J. Geophys. Res., 77, 6133 - 6144, 1972.
Samson, J. C. and G. Rostoker, Latitude-dependent characteristics of high-latitude Pc 4 and Pc 5 micro- pulsations, J. Geophys. Res., 77, 6133 - 6144, 1972.
Samson, J. C., J. A. Jacobs, and G. Rostoker, Latitude-dependent characteristics of long-period geomagnetic micropulsations, J. Geophys. Res., 76, 3675–3683, 1971.
Southwood, D. J., Recent studies in micropulsation theory, Space Sci. Rev., 16, 413–425, 1974.
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Rostoker, G., Samson, J.C., Olson, J.V. (1981). Latitudinal and Longitudinal Variation of Pc 4, 5 Pulsations and Implications Regarding Source Mechanisms. In: Southwood, D.J. (eds) ULF Pulsations in the Magnetosphere. Advances in Earth and Planetary Sciences, vol 11. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-8426-4_1
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DOI: https://doi.org/10.1007/978-94-009-8426-4_1
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