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Equatorial coronal arches and geomagnetic disturbance

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Abstract

Central-meridian passage of coronal equatorial arches is followed, statistically, after about 7 days by geomagnetic disturbance. Sector-boundary crossings at Earth are most likely to occur 5 days after arch CMP, while metric noise sources cluster at the location of the arches. This agrees with the location of the noise sources relative to sector boundaries described by Sakurai and Stone (1971), rather than with that found by Martres et al. (1970) for 1964 and 1966, and may indicate evolution of the relation between coronal and interplanetary structure. We looked for, but did not find, clustering of coronal arches at a particular phase of the Olsen rotation scheme.

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Authors and Affiliations

  1. Environmental Research Laboratories, National Oceanic and Atmospheric Administration, 80302, Boulder, Colo., U.S.A.

    C. Sawyer

  2. High Altitude Observatory, National Center for Atmospheric Research, 80302, Boulder, Colo., U.S.A.

    Shirley F. Hansen

Authors
  1. C. Sawyer
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  2. Shirley F. Hansen
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The National Center for Atmospheric Research is sponsored by the National Science Foundation.

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Sawyer, C., Hansen, S.F. Equatorial coronal arches and geomagnetic disturbance. Sol Phys 26, 370–377 (1972). https://doi.org/10.1007/BF00165278

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  • DOI: https://doi.org/10.1007/BF00165278

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