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Interplanetary consequences of transient coronal events observed with yohkoh sxt: A case study of polar coronal transient on 15 may 1992

  • IPS and Other Remote Sensing Measurements
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Abstract

A large area (5×1010km2) of a coronal hole disappeared in concert with a transient brightening of a nearby high-latitude coronal arcade in the northern hemisphere on 15 May 1992. This coronal-hole disappearance took place in a time scale of half a day. It is suggested that the large-scale and quick change in coronal-hole geometry induced the eruption of originally closed coronal magnetic structure of the high-latitude arcade. An associated solar wind disturbance with the plasma speed of >700 km/sec was observed by IPS, and geomagnetic sudden commencement was reported on 18 May 1992.

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Authors and Affiliations

  1. Department of Environmental Sciences, Ibaraki University, 310, Mito, Japan

    T. Watanabe & Y. Nakagawa

  2. Solar-terrestrial Environment Laboratory, Nagoya University, 442, Toyokawa, Japan

    M. Kojima

Authors
  1. T. Watanabe
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  2. Y. Nakagawa
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  3. M. Kojima
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Watanabe, T., Nakagawa, Y. & Kojima, M. Interplanetary consequences of transient coronal events observed with yohkoh sxt: A case study of polar coronal transient on 15 may 1992. Astrophys Space Sci 243, 239–245 (1996). https://doi.org/10.1007/BF00644062

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  • DOI: https://doi.org/10.1007/BF00644062

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