Enhancements of ionospheric total electron content in the southern auroral zone associated with magnetospheric substorms

  • Essex E
  • Watkins B
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The columnar total electron content of the ionosphere has been monitored continuously from Macquarie Island in the southern auroral zone during 1970 using the Faraday rotation technique. Many TEC increases have been noted during early morning hours. The large TEC increase which occurred on 20 May 1970 is used to illustrate the relation to magnetospheric substorms. The commencement of the TEC enhancements coincided with the occurrence of two substorms. Such TEC increases are possibly the source of large scale travelling ionospheric disturbances that have been observed at mid-latitudes propagating equatorward. © 1973.

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  • E. A. Essex

  • B. J. Watkins

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