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Helios observations of the earthward-directed mass ejection of 27 November, 1979

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Abstract

The Helios spacecraft zodiacal light photometers are used to observe the earthward-directed solar mass ejection transient of 27 November, 1979 described by Howard et al. (1982) that completely circles the Sun in coronagraph observations. At this time, Helios B was situated 30° east of the Sun-Earth line at 0.5 AU. The brightness increase moved outward directly along the Sun-Earth line over a period of approximately 24 hr, indicating a strong collimation of the ejection. The outward motion and mass estimates of the ejected material from the photometers compared with near-Earth observations from IMP spacecraft show that at least a portion of the density increase observed at Earth on 29 and 30 November was associated with this ejection.

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  1. University of California at San Diego, 92093, La Jolla, CA, U.S.A.

    B. V. Jackson

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  1. B. V. Jackson
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Jackson, B.V. Helios observations of the earthward-directed mass ejection of 27 November, 1979. Sol Phys 95, 363–370 (1985). https://doi.org/10.1007/BF00152413

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  • DOI: https://doi.org/10.1007/BF00152413

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