| Geomagnetic solar flare effect on February 4 and 6，1986 at the china Antarctic Great wall Station |
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| 引用本文： | 曾小苹,林云芳.Geomagnetic solar flare effect on February 4 and 6，1986 at the china Antarctic Great wall Station[J].地震学报(英文版),1995,8(1):143-148. |
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| 作者姓名： | 曾小苹 林云芳 |
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| 作者单位： | Institute of Geophysics，State Seismological Bureau，Beijing 100081，China |
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| 摘 要： | ＧｅｏｍａｇｎｅｔｉｃｓｏｌａｒｆｌａｒｅｅｆｆｅｃｔｏｎＦｅｂｒｕａｒｙ４ａｎｄ６，１９８６ａｔｔｈｅｃｈｉｎａＡｎｔａｒｃｔｉｃＧｒｅａｔｗａｌｌＳｔａｔｉｏｎＸｉａｏ－ＰｉｎｇＺＥＮＧａｎｄＹｕｎ－ＦａｎｇＬＩＮ（曾小苹，林云芳）（Ｉｎｓｔｉｔ...
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| 收稿时间： | 11 November 1993 |
| 修稿时间： | 23 August 1994 |
Geomagnetic solar flare effect on February 4and 6, 1986 at the china Antarctic Great wall Station |
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| Xiao-Ping ZENG and Yun-Fang LIN.Geomagnetic solar flare effect on February 4and 6, 1986 at the china Antarctic Great wall Station[J].Acta Seismologica Sinica(English Edition),1995,8(1):143-148. |
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| Authors: | Xiao-Ping ZENG and Yun-Fang LIN |
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| Institution: | (1) Institute of Geophysics, State Seismological Bureau, 100081 Beijing, China |
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| Abstract: | Taking the sampled every minute values of the horizontal, declination and vertical componentsH, D, Z and the intensity of total field F calculated fromH andZ on the magnetograms at ten geomagnetic observatories in China in the same periods, and at the China Antarctic Great Wall
Station (CAGWS), the authors conducted the maximum entropy analysis and band-pass filtration of these data and obtained the
following results: (1) At the periodT=10 − 90 min geomagnetic solar flare effect (sfe) is evident on the sunlit hemisphere. It is more pronounced at periods 15,
20, 25 and 30 min, and most prominent at 30 – 35 min. The solar X-ray spectra at the same time showed their peaks at 10 and
15 min; (2) The periodT=10 − 70 min of sfe at the CAGWS in the western Hemisphere was also recognizable after spectral analysis and filtration, but
the corresponding period of the maximum amplitude was different from that in the sunlit hemisphere. The results further proved
that the geomagnetic effect of solar flares could also be observed in the dark hemisphere; (3) The subsolar points of two
solar flares were found around Lanzhou, and the associated current density in the ionosphere was about 24 A/km. The transitional
zone from positive to negative sfe was found around the geographic latitudeϕ=22° − 24°N, where the sfe inH-crochet was almost illegible.
Contribution No. 95A0018, Institute of Geophysics, SSB, China. |
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| Keywords: | geomagnetic variation geomagnetic south Pole solar flare |
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