Main Article Content
During the interval 0400-1600 UT on August 31, 1978 strong pc5 activity was observed in the morning and afternoon sector of the magnetosphere. Using data from a world-wide network of ground-magnetometer stations and from the geostationary satellites GEOS 2, GOES 2 and 3 as well as the satellite pair ISEE 1 and 2 a case study was performed with special respect to the question of possible source mechanisms responsible for the observed pulsations. Like earlier workers we came up with the result that the Kelvin-Helmholtz instability at the magnetopause or in the low latitude boundary layer is a likely candidate. In particular we found a change in the azimuthal phase propagation direction from westwards on the morning side and eastward on the afternoon side. Also the sense of polarization and the azimuth of the ground magnetic disturbance in the horizontal plane changed across the meridian of the stagnation point as predicted by a Kelvin-Helmholtz instability source mechanism. A more detailed analysis was carried out for an isolated, large amplitude pc5 event at 1040 UT. At the same time magnetic field observations from the ISEE satellite pair indicate a flux transfer event (FTE) like disturbance at the magnetopause. Also indications of magnetopause boundary oscillations were found, and we feel that this FTE-like event constitutes a possible source for the observed impulsive pc5 event recorded on the ground and on GEOS 2. Furthermore, as the observed pc5 pulsations exhibit a wave-packet structure, we studied whether these wave packets coincided with substorms or substorm intensifications observed simultaneously in the nighttime magnetosphere. However, only a partial one-to-one correlation was found.
Authors who publish with this journal as of Vol. 63 agree to the following terms:
a. Authors share the copyright with this journal in equal parts (50% to the journal, 50% to the lead author), and grant the journal right of first publication, with the work after publication simultaneously licensed under Creative Commons Attribution License CC BY-NC-ND 4.0 that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
b. Authors may enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal, and a reference to this copyright notice.
c. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) during the submission process, as this can lead to productive exchanges and earlier and greater citation of published work and better sales of the copyright.
Authors retain copyright and grant the Journal of Geophysics right of first publication, with the work three years after publication simultaneously licensed under the Creative Commons BY-NC-ND 4.0 License that allows others to share the work (with an acknowledgment of the work's authorship and initial publication in this journal), except for commercial purposes and for creating derivatives.
Authors can enter into separate, additional, but non-commercial contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository, but not publish it in a book), with an acknowledgment of its initial publication in this journal.
Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) before and during the submission process, as that can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
This journal is one of a handful of scholarly journals that publish original scientific works under CC BY-NC-ND 4.0 - the only Creative Commons license affording the authors' intellectual property absolute worldwide protection.
Journal of Geophysics is published under the scholar-publishers model, meaning authors do not surrender their copyright to us. Instead, and unlike corporate publishers like Elsevier or Springer Nature that resell copyright to third-parties for up to $80,000 (per paper, per transaction!), the Journal of Geophysics authors share copyright equally with this journal.
Therefore, all the proceeds from reselling copyright to third parties get shared to equal parts (50% to the journal, 50% to the lead author). Under the Berne Convention, this protection is an inheritable right that lasts for as long as the rightsholder lives + 50 years.
By submitting to this journal, the lead author, on behalf of all co-authors, grants permission to this journal to represent all co-authors in negotiating copyright sales and collecting proceeds. The lead author should negotiate with his/her co-authors the modalities of distributing the lead author's portion of the proceeds. Usually, this is per pre-agreed percentage of each co-author's contribution to creating the copyrighted work. (more...)
Axford, W.I. (1963) Rotation of the magnetosphere. J. Geophys. Res. 68:5883-5885
Baumjohann, W., GlaBmeier, K.H. (1984) The transient response mechanism and Pi2 pulsations at substorm onset. Planet. Space Sci. (In press)
Chen, L., Hasegawa, A. (1974) A theory of long-period magnetic pulsations. 1. Steady state excitation of field line resonance. J. Geophys. Res. 79:1024-1032
Daly, P.W., Keppler, E. (1983) Remote sensing of a flux transfer event with energetic particles. J. Geophys. Res. 88:3971-3980
Fritz, T.A., Fahnenstiel. S.C. (1982) High temporal resolution energetic particle soundings at the magnetopause on November 8, 1977, using ISEE 2. J. Geophys. Res. 87:2125-2131
Formisano, V. (1979) Orientation and shape of the Earth's bow shock in three dimensions. Planet. Space Sci. 27:1151-1161
Glasmeier, K.H. (1980) Magnetometer array observations of a giant pulsation event. J. Geophys. 48:138-147
Glasmeier, K.H. (1984) On the influence of ionospheres with non-uniform conductivity distribution on hydromagnetic waves. J. Geophys. 54:125-137
Green, C.A. (1976) The longitudinal phase variation of mid-latitude Pc3-4 micropulsations. Planet. Space Sci. 24:79-85
Haerendel, G., Paschmann, G. (1982) Interaction of the solar wind with the dayside magnetosphere. In: Nishida, A. (Ed.) Magnetospheric plasma physics, pp. 49-142, Reidel, Dordrecht
Hughes, W.J. (1974) The effect of the atmosphere and ionosphere on long period magnetospheric micropulsations. Planet. Space Sci. 22:1157-1172
Hundhausen, A.J., Bame, S.J., Asbridge, J.R. (1969) Plasma flow pattern in the Earth's magnetosheath. J. Geophys. Res. 74:2799-2806
Kuppers, F., Untiedt, J., Baumjohann, W., Lange, K., Jones, A.G. (1979) A two-dimensional magnetometer array for ground-based observations of auroral zone electric currents during the IMS. J. Geophys. 46:429-450
Lanzerotti, L.J., Hasegawa, A. (1975) High beta plasma instabilities and storm time geomagnetic pulsations. J. Geophys. Res. 80:1019-1022
Lanzerotti, L.J., Southwood, D.J. (1979) Hydromagnetic waves. In: Lanzerotti, L.J., Kennel, C.F., Parker, E.N. (Eds.) Solar system plasma physics, North Holland Publishing Company, Amsterdam
Lee, L.C., Albano, R.K., Kan, J.R. (1981) Kelvin-Helmholtz instability in the magnetopause-boundary layer region. J. Geophys. Res. 86:54-58
Melzner, F., Metzner, G., Antrack, D. (1978) The GEOS electron beam experiment S-329. Space Sci. Instr. 4:45-55
Nishida, A. (1979) Possible origin of transient dusk-to-dawn electric fields in the nightside magnetosphere. J. Geophys. Res. 84:3409-3419
Olson, J.V., Rostoker, G. (1978) Longitudinal phase variation of Pc4-5 micropulsations. J. Geophys. Res. 83:2481-2488
Pu, Z.Y., Kivelson, M. (1983) Kelvin-Helmholtz instability at the magnetopause: solution for compressible plasmas. J. Geophys. Res. 88:841-852
Rankin, D., Kurtz, R. (1970) Statistical study ofmicropulsation polarization. J. Geophys. Res. 75:5444-5458
Reid, G.C., Holzer, T.E. (1975) The response of the dayside magnetosphere-ionosphere system to time varying field line reconnection at the magnetopause. 2. Erosion event of March 27, 1968. J. Geophys. 80:2050-2062
Rostoker, G., Spadinger, I., Samson, J.C. (1984) Local time variation in the response of Pc5 pulsations in the morning sector to substorm expansive phase onsets near midnight. J. Geophys. Res. (In press)
Russell, C.T., Elphic, R.C. (1979) ISEE Observations of flux transfer events at the dayside magnetopause. Geophys. Res. Lett. 6:33-36
Russell, C.T., Southwood, D.J. (Eds.) (1982) The IMS Source Book. American Geophysical Union, Washington, D.C.
Samson J.C. (1983) Pure states, polarized waves and principal components in the spectra of multiple geophysical time-series. Geophys. J. R. Astron. Soc. 72:647-664
Samson, J.C., Rostoker, G. (1981) Response of dayside Pc5 pulsations to substorm activity in the nighttime magnetosphere. J. Geophys. Res. 86:733-752
Saunders, M.A. (1983) Recent ISEE observations of the magnetopause and low latitude boundary layer: a review. J. Geophys. 52:190-198
Sen, A. (1965) Stability of the magnetospheric boundary. Planet. Space Sci. 13:131-141
Southwood, D.J. (1968) The hydromagnetic stability of the magnetospheric boundary. Planet. Space Sci. 16:587-605
Southwood, D.J. (1974) Some features of field line resonances in the magnetosphere. Planet. Space Sci. 22:481-491
Southwood, D.J. (1976) A general approach to low-frequency instability in the ring current plasma. J. Geophys. Res. 81:3340-3349
Southwood, D.J., Hughes, W.J. (1983) Theory of hydromagnetic waves in the magnetosphere. Space Sci. Rev. 35:301-366
Takahashi, K., Mc Pherron, R.L. (1982) Harmonic structure of Pc3-4 pulsations. J. Geophys. Res. 87:1504-1516
Tamao, T. (1965) Transmission and coupling resonance of hydromagnetic disturbances in the non-uniform Earth's magnetosphere. Sci. Rep. Tohoku Univ., Series 5; Geophysics 17, No. 2, 43-72
Walters, G.K. (1964) Effect of oblique interplanetary magnetic field on shape and behaviour of the magnetosphere. J. Geophys. Res. 69:1769-1774
Yumoto, K., Saito, T. (1980) Hydromagnetic waves driven by velocity shear instability in the magnetospheric boundary layer. Planet. Space Sci. 28:789-798
Zhuang, H.C., Russel, C.T., Waler, R.J. (1981) The influence of the interplanetary magnetic field and thermal pressure on the position and shape of the magnetopause. J. Geophys. Res. 86:10009-10021
Most read articles by the same author(s)
- A.B. Pashin, K.H. Glasmeier, W. Baumjohann, O.M. Raspopov, A.G. Yahnin, H.J. Opgenoorth, R.J. Pellinen, Pi2 magnetic pulsations, auroral break-ups, and the substorm current wedge: A case study , Journal of Geophysics: Vol 51 No 1 (1982): Journal of Geophysics