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MHD wave characteristics inferred from correlations between X-rays, VLF, and ULFs at Syowa Station, Antarctica and Tjörnes, Iceland (L∼6)
Earth, Planets and Space volume 51, pages 33–41 (1999)
The Polar Patrol Balloon No. 6 (PPB#6) observed quasi-periodic pulsations of bremsstrahlung X-rays (E 30∼120 keV) in the daytime of 0855 UT (0914 MLT) ∼ 1630 UT (1614 MLT) on January 5, 1993, near Syowa Station, Antarctica (L∼6). The X-ray pulsations near the noon (1208:00 UT (1216 MLT) ∼ 1225:04 UT (1232 MLT)) include a period of about 260 sec, which corresponds to Pc 5 magnetic pulsations. It was found that at Syowa Station and Tjörnes, Iceland, which are both pair locations of the geomagnetic conjugacy, the X-ray pulsations are in correlation with the ULF-D pulsations. Also the Tjörnes VLF (2 kHz) pulsations correlated well with the X-ray pulsations of the period corresponding to Pc 5. It is probable that the VLF- and ULF-associated X-rays or precipitating energetic electrons in the vicinity of the L ∼ 6 shell are in synchronization with the electron-cyclotron resonance. Lastly, the so-called ballooning-mirror instability (the BMI) is a candidate to explain the compressional MHD waves that occur during the short time interval (1216 MLT ∼ 1232 MLT) in which the experimental results were interpreted.
Barcus, J. R., R. R. Brown, and T. J. Rosenberg, Spatial and temporal characteristics of fast variations in auroralzone X rays, J. Geophys. Res., 71, 125–141, 1966.
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, 1974.
Chen, L. and A. Hasegawa, Kinetic theory of geomagnetic pulsations 1. Internal excitations of energetic particles, J. Geophys. Res., 96, 1503–1512, 1991.
Cheng, C. Z. and Q. Qian, Theory of ballooning-mirror instabilities for anisotropic pressure plasmas in the magnetosphere, J. Geophys. Res., 99, 11193–11209, 1994.
Cheng, C. Z., Q. Qian, K. Takahashi, and A. T. Y. Lui, Ballooning-mirror instability and internally driven Pc 4–5 wave events, J. Geomag. Geoelectr., 46, 997–1009, 1994.
Ebihara, Y., A. Kadokura, Y. Tonegawa, F. Tohyama, N. Sato, Y. Hirasima, M. Namiki, E. A. Bering, III, J. R. Benbrook, and M. Ejiri, A convection enhancement event observed with the Polar Patrol Balloon #4, Proc. NIPR Symp. Upper Atmos. Phys., 9, 12–24, 1996.
Fukunishi, H., Plasma wave phenomena in the earth’s magnetosphere, in The Solar Wind and the Earth, edited by S.-I. Akasofu and Y. Kamide, pp. 183–212, Terra Scientific Publ. Co., Tokyo, 1987.
Hasegawa, A., Drift mirror instability in the magnetosphere, Phys. Fluids, 12, 2642–2650, 1969.
Heppner, J. P. and N. C. Maynard, Empirical high-latitude electric field models, J. Geophys. Res., 92, 4467–4489, 1987.
Higuchi, T., S. Kokubun, and S. Ohtani, Harmonic structure of compressional Pc 5 pulsation at synchronous orbit, Geophys. Res. Lett., 13, 1101–1104, 1986.
Hughes, W. J., The magnetopause, magnetotail, and magnetic reconnection, in Introduction to Space Physics, edited by M. G. Kivelson and C. T. Russell, pp. 227–287, Cambridge University Press, New York, 1995.
Hurricane, O. A., MHD ballooning stability of a shared plasma sheet, J. Geophys. Res., 102, 19903–19911, 1997.
Kennel, C. F. and M. Ashour-Abdalla, Electrostatic waves and the strong diffusion of magnetospheric electrons, in Magnetospheric Plasma Physics, edited by A. Nishida, pp. 245–344, Center for Academic Publications Japan, Tokyo, 1982.
Kennel, C. F. and H. E. Petschek, Limit on stably trapped particle fluxes, J. Geophys. Res., 71, 1–28, 1966.
Kodama, M., H. Suzuki, Y. Hirasima, T. Yamagami, H. Murakami, and J. Nishimura, Circumpolar observation of bremsstrahlung X-rays by a Polar Patrol Balloon over Antarctica, J. Geomag. Geoelectr., 47, 253–266, 1995.
Kokubun, S., Statistical characteristics of Pc 5 waves at geostationary orbit, J. Geomag. Geoelectr., 37, 759–779, 1985.
Kokubun, S., M. G. Kivelson, R. L. McPherron, C. T. Russell, and H. I. West, Jr., Ogo 5 observations of Pc 5 waves: Particle flux modulations, J. Geophys. Res., 82, 2774–2786, 1977.
Kremser, G., A. Korth, J. A. Fejer, B. Wilken, A. V. Gurevich, and E. Amata, Observations of quasi-periodic flux variations of energetic ions and electrons associated with Pc 5 geomagnetic pulsations, J. Geophys. Res., 86, 3345–3356, 1981.
Kremser, G., A. Korth, S. Ullaland, J. Stadsnes, W. Baumjohann, L. Block, K. M. Torkar, W. Riedler, B. Aparicio, P. Tanskanen, I. B. Iversen, N. Cornilleau-Wehrlin, J. Solomon, and E. Amata, Energetic electron precipitation during a magnetospheric substorm and its relationship to wave particle interaction, J. Geophys. Res., 91, 5711–5718, 1986.
Lazutin, L. L., X-Ray Emission of Auroral Electrons and Magnetospheric Dynamics, p. 50, p. 155, Springer-Verlag, Berlin, 1986 (in Russian, Nauka, Moscow, 1979).
Lin, N., R. L. McPherron, M. G. Kivelson, and D. J. Williams, An unam-biguous determination of the propagation of a compressional Pc 5 wave, J. Geophys. Res., 93, 5601–5612, 1988.
McPherron, R. L., G. K. Parks, F. V. Coroniti, and S. H. Ward, Studies of the magnetospheric substorm 2. Correlated magnetic micropulsations and electron precipitation occurring during auroral substorms, J. Geophys. Res., 73, 1697–1713, 1968.
Miura, A., S. Ohtani, and T. Tamao, Ballooning instability and structure of diamagnetic hydromagnetic waves in a model magnetosphere, J. Geophys. Res., 94, 15231–15242, 1989.
Nagata, T. and S. Kokubun, An additional geomagnetic daily variation field (Sqp-field) in the polar region on geomagnetically quiet day, Rep. Ionos, Space Res. Japan, 16, 256–274, 1962.
Nishida, A., Geomagnetic Diagnosis of the Magnetosphere, p. 38, Springer-Verlag, New York, 1978.
Oguti, T. and K. Hayashi, Multiple correlation between auroral and magnetic pulsations 2. Determination of electric currents and electric fields around a pulsating auroral patch, J. Geophys. Res., 89, 7467–7481, 1984.
Ohtani, S., A. Miura, and T. Tamao, Coupling between Alfvén and slow magnetosonic waves in an inhomogeneous finite-plasma - I. Coupled equations and physical mechanism, Planet. Space Sci., 37, 567–577, 1989.
Park, C. G., C. S. Lin, and G. K. Parks, A ground-satellite study of wave-particle correlations, J. Geophys. Res., 86, 37–53, 1981.
Parks, G. K., Spatial characteristics of auroral-zone X-ray microbursts, J. Geophys. Res., 72, 215–226, 1967.
Parks, G. K., F. V. Coroniti, R. L. McPherron, and K. A. Anderson, Studies of the magnetospheric substorm 1. Characteristics of modulated energetic electron precipitation occurring during auroral substorm, J. Geophys. Res., 73, 1685–1696, 1968.
Rosenberg, T. J., J. C. Siren, D. L. Matthews, K. Marthinsen, J. A. Holtet, A. Egeland, D. L. Carpenter, and R. A. Helliwell, Conjugacy of electron microbursts and VLF chorus, J. Geophys. Res., 86, 5819–5832, 1981.
Sato, N., Quasi-periodic (QP) ELF-VLF emissions observed in high lati-tudes, Mem. Natl. Inst. Polar Res., Ser. A, 17, 1–120, 1980.
Sato, N. and S. Kokubun, Interaction between ELF-VLF emissions and magnetic pulsations: Quasi-periodic ELF-VLF emissions associated with Pc 3–4 magnetic pulsations and their geomagnetic conjugacy, J. Geophys. Res., 85, 101–113, 1980.
Saunders, M., The Earth’s magnetosphere, in Advances in Solar System Magnetohydrodynamics, edited by E. R. Priest and A. W. Hood, pp. 357–397, Cambridge University Press, Cambridge, 1991.
Sugiura, M. and C. Wilson, Oscillation of the geomagnetic field lines and associated magnetic perturbations at conjugate points, J. Geophys. Res., 69, 1211–1216, 1964.
Sundaram, A. K. and D. H. Fairfield, Stability of resistive MHD tearing and ballooning modes in the tail current sheet, J. Geophys. Res., 102, 19913–19925, 1997.
Suzuki, H., Broad-spatial characteristics and energy spectrum characteristics of auroral X-rays observed by a Polar Patrol Balloon, Nankyoku Shiryo (Antarct. Rec.), 40, 125–155, 1996 (in Japanese with English abstract).
Takahashi, K., C. Z. Cheng, R. W. McEntire, and L. M. Kistler, Observation and theory of Pc 5 waves with harmonically related transverse and compressional components, J. Geophys. Res., 95, 977–989, 1990a.
Takahashi, K., R. W. McEntire, A. T. Y. Lui, and T. A. Potemura, Ion flux oscillations associated with a radially polarized transverse Pc 5 magnetic pulsation, J. Geophys. Res., 95, 3717–3731, 1990b.
Terasawa, T. and A. Nishida, Simultaneous observations of relativistic electron bursts and neutralline signatures in the magnetotail, Planet. Space Sci., 24, 855–866, 1976.
Tonegawa, Y. and H. Fukunishi, Harmonic structure of Pc 3–5 magnetic pulsations observed at the Syowa-Husafell conjugate pair, J. Geophys. Res., 89, 6737–6748, 1984.
Treumann, R. A. and W. Baumjohann, Advanced Space Plasma Physics, p. 55, Imperial College Press, London, 1997.
Ullaland, S., G. Kremser, P. Tanskanen, A. Korth, A. Roux, K. Torkar, L. P. Block, and I. B. Iversen, On the development of a magnetospheric sub-storm influenced by a storm sudden commencement: Ground, balloon, and satellite observations, J. Geophys. Res., 98, 15381–15401, 1993.
Yamagami, T., M. Namiki, S. Ohta, N. Yajima, H. Suzuki, Y. Hirasima, H. Murakami, K. Morimoto, I. Yamagiwa, M. Nakagawa, T. Takahashi, S. Murakami, J. Nishimura, Y. Tonegawa, M. Ejiri, N. Sato, T. Kohno, and M. Kodama, A Polar Patrol Balloon observation of cosmicray protons and auroral X-rays in Antarctica, J. Geomag. Geoelectr., 46, 903–908, 1994.
Yamagishi, H., ELF emission in high latitudes-Ray path calculation and ground-satellite observations, Mem. Natl. Inst. Polar Res., Ser. A, 19, 1–120, 1989.
Yamagishi, H., T. Ono, H. Fukunishi, T. Yamagami, J. Nishimura, M. Kodama, Y. Hirasima, H. Murakami, J. A. Holtet, S. Ullaland, and R. J. Pellinen, Pulsating phenomena of auroral-zone X-rays associated with quasi-periodic VLF emissions and Pc 3 magnetic pulsations, J. Geomag. Geoelectr., 37, 927–943, 1985.
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Hirasima, Y., Shimobayashi, H., Yamagishi, H. et al. MHD wave characteristics inferred from correlations between X-rays, VLF, and ULFs at Syowa Station, Antarctica and Tjörnes, Iceland (L∼6). Earth Planet Sp 51, 33–41 (1999). https://doi.org/10.1186/BF03352207
- Energetic Electron
- Magnetic Pulsation
- Geomagnetic Pulsation
- Magnetic Local Time
- Whistler Mode