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Characteristics of geomagnetic sudden commencement observed in middle and low latitudes
Earth, Planets and Space volume 50, pages755–772(1998)
- The Erratum to this article has been published in Earth, Planets and Space 2014 51:BF03352211
Characteristics of geomagnetic sudden commencement (SC) observed in middle and low latitudes are discussed on the basis of data analyses of magnetic variations and a numerical calculation. From the data analyses, it is found that a negative impulse is usually superposed on the main impulse of SC in H component just after its onset, at the stations in middle to high latitudes in the local time range from the morning to the early afternoon. The superposition of the negative impulse causes the decrease of SC amplitude in H component with increasing latitude in this area. The occurrence of the negative impulse does not seem to be dependent on geomagnetic activity. Examining a case study and a numerical analysis, it is suggested that this negative impulse is a signature of the magnetic variation due to the polar-originated ionospheric current system responsible for the main impulse of SC (DPMI). The discussion includes the possible interpretation of PPI introduced by Kikuchi and Araki (1985) and the availability of D component magnetic data in middle latitude forarough estimationof the magnetosphere-ionosphere coupling process.
Araki, T., Global structure of geomagnetic sudden commencements, Planet. Space Sci., 25, 373–384, 1977.
Araki, T., A physical model of the geomagnetic sudden commencement, in Solar Wind Sources of Magnetispheric Ultra-Low-Frequency Waves, edited by M. J. Engebreston, K. Takahashi, and M. Scholer, pp. 183–200, Geophysical Monograph 81, 1994.
Araki, T., S. Fujitani, M. Emoto, K. Yumoto, K. Shiokawa, T. Ichinose, H. Luehr, D. Orr, D. K. Milling, H. Singer, G. Rostoker, S. Tsunomura, Y. Yamada, and C. F. Liu, Anomalous sudden commencement on March 24, 1991, J. Geophys. Res., 102, 14075–14086, 1997.
Blake, J., W. A. Kolasinski, R. W. Fillus, and E. G. Mullen, Injection of electrons and protons with energies of tens of MeV into L < 3 on 24 March 1991, Geophys. Res. Lett., 19, 821–824, 1992.
Itonaga, M., K. Matsuzono, T.-I. Kitamura, I. Toshimitsu, N. B. Trivedi, R. Horita, T. Watanabe, and J. Riddick, Global structure of low-latitude and equatorial geomagnetic pulsations associated with sudden commencements, J. Geomag. Geoelectr., 47, 441–457, 1995.
Iyemori, T. and S. Tsunomura, Characteristics of the association between an SC and a substorm onset, Mem. NIPR Special Issue, No. 26, 139–148, 1983.
Kamide, Y. and S. Matsushita, Simulation studies of ionospheric electric fields and currents in relation to field-aligned currents 1. Quiet periods, J. Geophys. Res., 84, 4083–4098, 1979a.
Kamide, Y. and S. Matsushita, Simulation studies of ionospheric electric fields and currents in relation to field-aligned currents 2. Substorms, J. Geophys. Res., 84, 4099–4115, 1979b.
Kikuchi, T., Evidence of transmission of polar electric fields to the low latitude at times of geomagnetic sudden commencements, J. Geophys. Res., 91, 3101–3105, 1986.
Kikuchi, T. and T. Araki, Horizontal transmission of the polar electric field to the equator, J. Atmos. Terr. Phys., 41, 927–936, 1979.
Kikuchi, T. and T. Araki, Preliminary positive impulse of geomagnetic sudden commencement observed at dayside middle and low latitudes, J. Geophys. Res., 90, 12195–12200, 1985.
Kikuchi, T., T. Ishimine, and H. Sugiuchi, Local time distribution of HF Doppler frequency deviations associated with storm sudden commencements, J. Geophys. Res., 90, 4389–4393, 1985.
Kokubun, S., R. L. McPherron, and C. T. Russel, Triggering of substorms by solar wind discontinuities, J. Geophys. Res., 82, 74–86, 1977.
Petrinec, S. M., K. Yumoto, H. Lühr, D. Orr, D. Milling, K. Hayashi, S. Kokubun, and T. Araki, The CME event of February 21, 1994: Response of the magnetic field at the Earth’s surface, J. Geomag. Geoelectr, 48, 1341–1379, 1996.
Reiff, P. H., Models of auroral-zone conductances, in Magnetospheric Currents, Geophys. Monogr. Ser., Vol. 28, edited by T. A. Potemra, pp. 180–191, AGU, Washington, D.C., 1984.
Rikitake, T. and S. Sato, The geomagnetic Dstfield of the magnetic storm on June 18–19, 1936, Bull. Earthq. Res. Inst, Univ. Tokyo, 35, 7–21, 1957.
Russell, C. T. and M. Ginskey, Sudden impulses at subauroral latitudes: Response for northward interplanetary magnetic field, J. Geophys. Res., 100, 23695–23702, 1995.
Russell, C. T., M. Ginskey, and S. M. Petrinec, Sudden impulses at low-latitude stations: Steady state response for northward interplanetary magnetic field, J. Geophys. Res., 99, 253–261, 1994a.
Russell, C. T, M. Ginskey, and S. M. Petrinec, Sudden impulses at low latitude stations: Steady state response for southward interplanetary magnetic field, J. Geophys. Res., 99, 13403–13408, 1994b.
Sastri, J. H., J. V. S. V. Rao, and K. B. Ramesh, Penetration of polar electric fields to the nightside dip equator at times of geomagnetic sudden commencements, J. Geophys. Res., 98, 17517–17523, 1993.
Sitar, R. J., C. R. Clauer, and E. Friis-Christensen, High-latitude ground-based response to sudden changes in solar wind dynamic pressure, J. Geophys. Res., 101, 27001–27013, 1996.
Sugiura, M. and S. Chapman, The average morphology of geomagnetic storms with sudden commencements, Abh. Akad. Wiss. Göttingen, Math.-phys., Kl., Sonderheft, Spec. Issue 4, 53 pp., 1960.
Tsunomura, S., On the polarity of SSC and SI observed in low latitudes, Mem. Kakioka Mag. Obs., 26, 15–36, 1995.
Tsunomura, S. and T. Araki, Numerical analysis of equatorial enhancement of geomagnetic sudden commencement, Planet. Space Sci., 32, 599–604, 1984.
Yamada, Y, M. Takeda, and T. Araki, Occurrence characteristics of the preliminary impulse of geomagnetic sudden commencement detected at middle and low latitudes, J. Geomag. Geoelectr., 49, 1001–1012, 1997.
Yumoto, K., Y. Tanaka, T. Oguchi, K. Shiokawa, Y. Yoshimura, A. Isono, B. J. Fraser, F. W. Menk, J. W. Lynn, M. Seto, and 210° MM Magnetic Observation Group, Globally coordinated magnetic observations along 210° magnetic meridian during STEP period: 1. Preliminary results of low latitude Pc3’s, J. Geomag. Geoelectr, 44, 261–276, 1992.
Yumoto, K., H. Osaki, K. Fukao, K. Shiokawa, Y. Tanaka, S. I. Solovyev, G. Krymskij, E. F. Vershinin, V. F. Osinin, and 210° MM Magnetic Observation Group, Correlation of high- and low-latitude Pi2 magnetic pulsations observed at 210° magnetic meridian chain stations, J. Geomag. Geoelectr, 46, 925–935, 1994.
Yumoto, K. and the 210° MM Magnetic Observation Group, Initial results from the 210° magnetic meridian project—Review, J. Geomag. Geoelectr, 47, 1197–1213, 1995.
Yumoto, K. and the 210° MM Magnetic Observation Group, The STEP 210° magnetic meridian network project, J. Geomag. Geoelectr, 48, 1297–1309, 1996.
An erratum to this article is available at http://dx.doi.org/10.1186/BF03352211.
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Tsunomura, S. Characteristics of geomagnetic sudden commencement observed in middle and low latitudes. Earth Planet Sp 50, 755–772 (1998). https://doi.org/10.1186/BF03352168
- Solar Wind
- Geomagnetic Storm
- Middle Latitude
- Sudden Commencement
- Negative Impulse