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ULF pulsations observed by the ETS-VI satellite: Substorm associated azimuthal Pc 4 pulsations on the nightside

Earth, Planets and Space volume 50, pages 63–80 (1998)Cite this article

Abstract

The magnetic field data from the Engineering Test Satellite -VI (ETS-VI) have been analyzed to investigate the occurrence distributions of pulsations in Pc 3–5 frequency ranges in the magnetosphere. The observation of ETS-VI covered the invariant latitude (ILAT) range of 64.5°−69°ILAT near the geomagnetic equator (−10°−20° magnetic latitude) at all magnetic local time (MLT). Magnetic pulsations were selected by the Fast Fourier Transform method and checked by visual scanning if they have continuous waveforms. From the occurrence distributions of pulsations, we have found distinctive features in the following pulsations: (1) azimuthal Pc 5 pulsation; (2) azimuthal Pc 3 pulsation; (3) radial Pc 4 pulsation on the dayside; (4) azimuthal Pc 4 pulsations on the nightside. In respect of the first three types of pulsations (i.e., the azimuthal Pc 5 pulsation, the azimuthal Pc 3 pulsation, and the radial Pc 4 pulsation on the dayside), the results presented in this study confirm the previous results obtained by other satellite observations. The azimuthal Pc 4 pulsations on the nightside were observed in continuous waveforms lasting for about 10 minutes. Although the azimuthal Pc 4 pulsations on the nightside start at almost the same time as substorm onsets, they are different from Pi 2 pulsations in the magnetosphere. They are observed frequently in the MLT range of 23-04MLT with an occurrence peak at 01–02MLT. We suggest that the azimuthal Pc 4 pulsations on the nightside are excited through coupling to the fast mode Alfvén waves which were launched at substorm onset.

References

  • Anderson, B. J., M. J. Engebretson, S. P. Rounds, L. J. Zanetti, and T. A. Potemra, A statistical study of Pc 3–5 pulsations observed by the AMPTE/CCE magnetic fields experiment, 1. Occurrence distributions, J. Geophys. Res., 95, 10495–10523, 1990a.

    Article  Google Scholar 

  • Anderson, B. J., T. A. Potemra, L. J. Zanetti, and M. J. Engebretson, Statis-tical correlations between Pc 3–5 pulsations and solar wind/IMF parame-ters and geomagnetic indicies, Physics of Space Plasmas, SPI Conference Proceedings and Reprint Series, Number 10, pp. 419–429, Scientific Pub-lishers, Inc., Cambridge, MA, 1990b.

    Google Scholar 

  • Arthur, C. W. and R. L. McPherron, Micropulsations in the morning sector, 3. Simultaneous ground-satellite observations of 10- to 45-s period waves near L = 6.6, J. Geophys. Res., 82, 2859–2866, 1977.

    Article  Google Scholar 

  • Arthur, C. W. and R. L. McPherron, The statistical character of Pc 4 magnetic pulsations at synchronous orbit, J. Geophys. Res., 86, 1325–1334, 1981.

    Article  Google Scholar 

  • Chapell, C. R., K. K. Harris, and G. W. Sharp, A study of the influence of magnetic activity on the location of the plasmapause as measured by OGO 5, J. Geophys. Res., 75, 50–56, 1970.

    Article  Google Scholar 

  • Chen, L. and A. Hasegawa, A theory of long-period magnetic pulsations, 1. Steady state excitation of field line resonance, J. Geophys. Res., 79, 1024–1037, 1974.

    Article  Google Scholar 

  • Cummings, W. D., R. J. O’Sullivan, and P. J. Coleman, Jr., Standing Alfvén waves in the magnetosphere, J. Geophys. Res., 74, 778–793, 1969.

    Article  Google Scholar 

  • Ellis, P. and D. J. Southwood, Reflection of Alfvén waves by non-uniform ionospheres, Planet. Space Sci., 31, 107–117, 1983.

    Article  Google Scholar 

  • Engebretson, M. J., L. J. Zanetti, T. A. Potemra, and M. H. Acuna, Harmon-ically structured ULF pulsations observed by the AMPTE CCE magnetic field experiment, Geophys. Res. Lett., 13, 905–908, 1986.

    Article  Google Scholar 

  • Hamlin, D. A., R. Karplus, R. C. Vik, and K. M. Watson, Mirror and az-imuthal drift frequencies for geomagnetically trapped particles, J. Geo-phys. Res., 66, 1–4, 1961.

    Article  Google Scholar 

  • Hughes, W. J., Magnetospheric ULF waves: A tutorial with a historical per-spective, in Solar Wind Sources of Magnetospheric Ultra-Low-Frequency Waves, Geophys. Monogr. Ser., vol. 81, edited by M. J. Engebretson, K. Takahashi, and M. Scholer, pp. 1–11, AGU, Washington, D. C., 1994.

    Chapter  Google Scholar 

  • Jacobs, J. A., Y. Kato, S. Matsushita, and V. A. Troitskaya, Classification of geomagnetic micropulsations, J. Geophys. Res., 69, 180–181, 1964.

    Article  Google Scholar 

  • Kokubun, S., Statistical characteristics of Pc 5 waves at geostationary orbit, J. Geomag. Geoelectr., 37, 759–779, 1985.

    Article  Google Scholar 

  • Kokubun, S., K. N. Erickson, T. A. Fritz, and R. L. McPherron, Local time asymmetry of Pc 4–5 pulsations and associated particle modulations at synchronous orbit, J. Geophys. Res., 94, 6607–6625, 1989.

    Article  Google Scholar 

  • Kuwashima, M., Wave characteristics of magnetic Pi 2 pulsations in the magnetosphere and on the ground, Mem. Kakioka Magn. Obs., 20, 1–15, 1983.

    Google Scholar 

  • Lin, C. C. and L. J. Cahill, Jr., Pi 2 pulsations in the magnetosphere, Planet. Space Sci., 23, 693–711, 1975.

    Article  Google Scholar 

  • Nagai, T., T. Ondoh, H. Matsumoto, T. Goka, T. Fukuda, M. Nosé, T. Iye-mori, K. Takahashi, and S. Kokubun, ETS-VI magnetic field observations of the near-earth magnetotail during substorms, J. Geomag. Geoelectr., 48, 741–748, 1996.

    Article  Google Scholar 

  • Nosé, M., T. Iyemori, M. Sugiura, and J. A. Slavin, A strong dawn/dusk asymmetry in Pc 5 pulsation occurrence observed by the DE-1 satellite, Geophys. Res. Lett., 22, 2053–2056, 1995.

    Article  Google Scholar 

  • Olbert, S., Summary of experimental results from M.I.T. detector on IMP-1, in Physics of the Magnetosphere, edited by R. L. Carovillano, J. F. McClay, and H. R. Radoski, pp. 641–659, Reidel Doredrecht, 1968.

  • Potemra, T. A. and L. G. Blomberg, A survey of Pc 5 pulsations in the dayside high-latitude regions observed by Viking, J. Geophys. Res., 101, 24801–24813, 1996.

    Article  Google Scholar 

  • Saito, T., Long-period irregular magnetic pulsation, Pi 3, Space Sci. Rev., 21, 427–467, 1978.

    Article  Google Scholar 

  • Saito, T., K. Yumoto, and Y. Koyama, Magnetic pulsation Pi 2 as a sensitive indicator of magnetospheric substorm, Planet. Space Sci., 24, 1025–1029, 1976.

    Article  Google Scholar 

  • Saka, O., H. Akaki, O. Watanabe, and D. N. Baker, Ground-satellite correla-tion of low-latitude Pi 2 pulsations: A quasi-periodic field line oscillation in the magnetosphere, J. Geophys. Res., 101, 15433–15440, 1996a.

    Article  Google Scholar 

  • Saka, O., O. Watanabe, and D. N. Baker, A possible driving source for tran-sient field line oscillations in the postmidnight sector at geosynchronous altitudes, J. Geophys. Res., 101, 24719–24726, 1996b.

    Article  Google Scholar 

  • Sakurai, T. and R. L. McPherron, Satellite observations of Pi 2 activity at synchronous orbit, J. Geophys. Res., 88, 7015–7027, 1983.

    Article  Google Scholar 

  • Sakurai, T. and T. Saito, Magnetic pulsation Pi 2 and substorm onset, Planet. Space Sci., 24, 573–575, 1976.

    Article  Google Scholar 

  • Singer, H. J., W. J. Hughes, P. F. Fougere, and D. J. Knecht, The localization of Pi 2 pulsations: Ground-satellite observations, J. Geophys. Res., 88, 7029–7036, 1983.

    Article  Google Scholar 

  • Snyder, C. W., M. Neugebauer, and U. R. Rao, The solar wind velocity and its correlation with cosmic-ray variations and with solar and geomagnetic activity, J. Geophys. Res., 68, 6361–6370, 1963.

    Article  Google Scholar 

  • Southwood, D. J., Some features of field line resonances in the magneto-sphere, Planet. Space Sci., 22, 483–491, 1974.

    Article  Google Scholar 

  • Spiro, R. W., P. H. Reiff, and L. J. Maher, Jr., Precipitating electron energy flux and auroral zone conductances-An empirical model, J. Geophys. Res., 87, 8215–8227, 1982.

    Article  Google Scholar 

  • Takahashi, K. and B. J. Anderson, Distribution of ULF energy (f < 80 mHz) in the inner magnetosphere: A statistical analysis of AMPTE CCE magnetic field data, J. Geophys. Res., 97, 10751–10773, 1992.

    Article  Google Scholar 

  • Takahashi, K. and R. L. McPherron, Standing hydromagnetic oscillations in the magnetosphere, Planet. Space Sci., 32, 1343–1359, 1984.

    Article  Google Scholar 

  • Takahashi, K., S. Ohtani, and B. J. Anderson, Statistical analysis of Pi 2 pulsations observed by the AMPTE CCE spacecraft in the inner magne-tosphere, J. Geophys. Res., 100, 21929–21941, 1995.

    Article  Google Scholar 

  • Takahashi, K., B. J. Anderson, and S. Ohtani, Multisatellite study of night-side transient toroidal waves, J. Geophys. Res., 101, 24815–24825, 1996.

    Article  Google Scholar 

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Authors and Affiliations

  1. Faculty of Science, Kyoto University, Kyoto, 606-8502, Japan

    M. Nosé, T. Iyemori & S. Nakabe

  2. Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo, 152-8551, Japan

    T. Nagai

  3. Office of Research and Development, National Space Development Agency of Japan, Tsukuba, 305-0047, Japan

    H. Matsumoto & T. Goka

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  1. M. Nosé
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  2. T. Iyemori
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  3. S. Nakabe
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  4. T. Nagai
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  5. H. Matsumoto
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  6. T. Goka
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Correspondence to M. Nosé.

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Nosé, M., Iyemori, T., Nakabe, S. et al. ULF pulsations observed by the ETS-VI satellite: Substorm associated azimuthal Pc 4 pulsations on the nightside. Earth Planet Sp 50, 63–80 (1998). https://doi.org/10.1186/BF03352087

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