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The coronal disturbance of 1972, August 12

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Abstract

The association of flare sprays, distortions of the overlying coronal structures and moving type IV radio bursts is a reasonable one and is well accepted despite the paucity of observational evidence. On 1972, August 12, there occurred a flare spray observed optically by both flare patrol and coronagraph instruments. A subsequent moving type IV radio burst was recorded by several instruments and distinct changes in the coronal brightness at 1.6 R ⊙ were measured. These observations combine to form one of the most complete sequences of measurements yet recorded covering the range from the chromosphere to about 6 R ⊙. The separate measurements are discussed and we show that they can be combined to form a relatively simple physical picture of the whole event.

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Authors and Affiliations

  1. University of Colorado, Boulder, Colo., U.S.A.

    Anthony C. Riddle

  2. High Altitude Observatory, Boulder, Colo., U.S.A.

    Richard T. Hansen & Einar Tandberg-Hanssen

Authors
  1. Anthony C. Riddle
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  2. Richard T. Hansen
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  3. Einar Tandberg-Hanssen
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On leave from CSIRO, Division of Radiophysics, Sydney, Australia.

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Riddle, A.C., Hansen, R.T. & Tandberg-Hanssen, E. The coronal disturbance of 1972, August 12. Sol Phys 35, 171–179 (1974). https://doi.org/10.1007/BF00156965

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