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GAO YUFENup, ZHOU GENGup2com sh ad. 1990: THE SEASONAL VARIATIONS OF Sq(H) AT THE GEOMAGNETIC OBSERVATORY-CHAIN IN EASTERN CHINA. Acta Seismologica Sinica, 12(2): 159-165.
Citation: GAO YUFENup, ZHOU GENGup2com sh ad. 1990: THE SEASONAL VARIATIONS OF Sq(H) AT THE GEOMAGNETIC OBSERVATORY-CHAIN IN EASTERN CHINA. Acta Seismologica Sinica, 12(2): 159-165.
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THE SEASONAL VARIATIONS OF Sq(H) AT THE GEOMAGNETIC OBSERVATORY-CHAIN IN EASTERN CHINA

  • 1. Institute of Geophysics, State Scismological Bureau; 2. State Seismological Bureau

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  • Published Date: September 01, 2011
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    • Abstract
  • A detailed north-south section around the meridian at 120E of seasonal variation of Sq(H) for quiet days are presented using the data of ten geomagnetic observatories with nearly equal separation in latitudes between stations in eastern China,with the method of main component analysis. The apparent focus latitude of the equivalent current system in the ionosphere is presented. It is shown that the variation of 2 for Sq(H) is resulted from the deviation of the axis of symmetry of the equivalent current system from the geomagnetic axis.
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    • References (1)
  • [1] (iamphell, W. H .,1982. Annual and Semiannual changes of the quiet daily vanattons(Sq) in the Geumaghetic field at north American locations. J. G. R.,87, A2 785——796.

    [2] Shlapp, D. M., 1976. Day——to——day variability of the latitudes of the Sq foci.J. Atmos. Terr Plays., 38, 5,573——577.

    [3] Tatpley, J.D., 1973. Seasonal movement of the Sq current foci and related effects in the equatorial electroject. J.Atmos.Terr.Phys., 35. 1063——1071.

    [4] 高玉芬、祁燕琴,1981,中国地区地磁垂直分量日变幅的空间分布及高空电流体系焦点位置的移动,地震学报,3, 143——151.

    [5] Rajaram, M., 1983. Determination of the latitude of Sq focus and its relation to the electroject variation.J. Atoms, Terr. Phys., 45, 8/9, 573——578.

    [6] 徐文耀,1987.用中低纬度地磁资料确定哭电流体系的焦点.空间科学学报,7,2,117——127.

    [7] Olson, W. P., 1970. Contribution of nonionospheric currents to the quiet daily magnetic variations at the earth's surface. J. G. R., 75, 7244——7249.

    [8] Matsushita, S., 1971. Interaction between the ionosphere and magnetosphere for Sq and L variations. Radio Sci., 6, 2, 279——294.

    [9] Fukushima, N. and Kamide, Y., 1973. Contribution of magnetospheric field——alighed current to geomagnetic bays and Sq fields: a comment on partial ring——current model. Radio Sci., 8, 11, 1013——1017.

    [10] Fukushima, N., Contribution to geomagnetic Sg——field and equatorial electroject from the day/night asymmerry of ionospheric current under dawn——dusk electric field in the magnetosphere. IAGA Vancouver Assembly, GA9. 1.

    [1] (iamphell, W. H .,1982. Annual and Semiannual changes of the quiet daily vanattons(Sq) in the Geumaghetic field at north American locations. J. G. R.,87, A2 785——796.

    [2] Shlapp, D. M., 1976. Day——to——day variability of the latitudes of the Sq foci.J. Atmos. Terr Plays., 38, 5,573——577.

    [3] Tatpley, J.D., 1973. Seasonal movement of the Sq current foci and related effects in the equatorial electroject. J.Atmos.Terr.Phys., 35. 1063——1071.

    [4] 高玉芬、祁燕琴,1981,中国地区地磁垂直分量日变幅的空间分布及高空电流体系焦点位置的移动,地震学报,3, 143——151.

    [5] Rajaram, M., 1983. Determination of the latitude of Sq focus and its relation to the electroject variation.J. Atoms, Terr. Phys., 45, 8/9, 573——578.

    [6] 徐文耀,1987.用中低纬度地磁资料确定哭电流体系的焦点.空间科学学报,7,2,117——127.

    [7] Olson, W. P., 1970. Contribution of nonionospheric currents to the quiet daily magnetic variations at the earth's surface. J. G. R., 75, 7244——7249.

    [8] Matsushita, S., 1971. Interaction between the ionosphere and magnetosphere for Sq and L variations. Radio Sci., 6, 2, 279——294.

    [9] Fukushima, N. and Kamide, Y., 1973. Contribution of magnetospheric field——alighed current to geomagnetic bays and Sq fields: a comment on partial ring——current model. Radio Sci., 8, 11, 1013——1017.

    [10] Fukushima, N., Contribution to geomagnetic Sg——field and equatorial electroject from the day/night asymmerry of ionospheric current under dawn——dusk electric field in the magnetosphere. IAGA Vancouver Assembly, GA9. 1.
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