Relationships between coronal and interplanetary structures inferred from energetic particle observations

1 January 1999

conference paper
Published by AIP Publishing

p. 677-680
https://doi.org/10.1063/1.58712

Abstract

In recent studies, we have pointed out that the characteristic energetic particle signatures of interplanetary shocks, ejecta and corotating streams can be used to infer the presence of these structures even when in-situ solar wind observations are not available. The detailed solar observations currently available provide a test of this method. Using observations in 1996–97, we find that most (∼80%) of the earthward-directed CMEs observed by the SOHO/LASCO coronagraph produced signatures in the energetic particle data. We also note that, considering all the CMEs observed by LASCO, those associated with energetic (>20 MeV) particle events were accompanied by the “traditional” signatures of energetic solar events such as type II and IV radio emissions, and Hα, and X-ray flares. They also had higher than average speeds and angular widths in the coronagraph observations.

Keywords

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