What caused the large geomagnetic storm of November 1978?

Details What caused the large geomagnetic storm of November 1978? What caused the large geomagnetic storm of November 1978?

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jgr...10217445c&link_type=abstract

Journal of Geophysical Research, Volume 102, Issue A8, p. 17445-17450

Astronomy and Astrophysics

Astrophysics

10

Interplanetary Physics: Discontinuities, Interplanetary Physics: Ejecta, Driver Gases, And Magnetic Clouds, Magnetospheric Physics: Storms And Substorms, Solar Physics, Astrophysics, And Astronomy: Coronal Mass Ejections

Scientific paper

We discuss energetic particle and solar wind plasma data for the period around the large geomagnetic storm of November 24-25, 1978. The storm was clearly caused by an ejecta interacting with a corotating high-speed stream. We conclude that there are no data to support the attribution of this storm to specific solar activity as previously suggested. This case study illustrates the important role of energetic particles in making correct associations between solar and interplanetary phenomena. Even if there had been an identifiable source region for the ejecta, the intensity of the geomagnetic storm resulted from the interplanetary interaction. Thus predictions of the strengths of such storms cannot be based on solar observations alone but also require knowledge of stream interactions.

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