Abstract
The powerful cosmic ray flare of Sept. 29, 1989 occurred behind the limb and was observed over a wide spectral range. The analysis of optical, radio, and other relevant data suggest two phases of energy release. After an impulsive phase a prolonged post eruption energy release occurred in an extended region of the corona following the eruption of a large coronal mass ejection (CME). This phase is responsible for numerous coronal and interplanetary phenomena including the ground-level increase of cosmic rays.
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Bhatnagar, A., Jain, R.M., Burkepile, J.T. et al. Transient phenomena in the energetic behind-the-limb solar flare of september 29, 1989. Astrophys Space Sci 243, 209–213 (1996). https://doi.org/10.1007/BF00644057
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DOI: https://doi.org/10.1007/BF00644057