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Mid-latitude horizontal electric fields in the stratosphere during magnetically disturbed periods |
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| Authors: | Toshio Ogawa Hiroto Kawamoto |
| Institution: | Geophysical Institute, Kyoto University, Kyoto 606, Japan |
| Abstract: | The horizontal electric field has been measured with balloons over the Pacific Ocean near the Sanriku Coast in Japan. By comparing the electric-field data obtained during magnetically disturbed periods, 16–17 October 1973, 6–7 October 1975 and 3–4 October 1977, with IMF Bz, auroral zone AU and AL, equatorial Dst and , mid-latitude magnetic fields (H, D, Z at Kakioka), and the ionospheric electron density (?0F2 at Kokubunji), it is found that the observed electric fields of about 9 mVm?1 made the clockwise rotation during the growth and recovery stages of the magnetospheric substorms. Relations between high and middle latitude ionospheres and between the magnetosphere and the ionosphere are discussed in relation to the origin and propagation of these electric fields. |
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