Observations of a ^3He-rich SEP Event over a Broad Range of Heliographic Longitudes: Results from STEREO and ACE
Observations of energetic ions and electrons from STEREO and ACE have been used to investigate the longitudinal extent of particle emissions from 3He ‐rich solar energetic particle (SEP) events. In the event of 3–4 Nov 2008, ions and electrons were detected 20° ahead and behind the nominal connection from the source region to 1 AU, and electrons were also detected 60° ahead. The results are consistent with those of earlier studies that correlated data from near‐Earth spacecraft with Helios data or with observations of source regions on the Sun.
Additional Information© 2010 American Institute of Physics. Published online 25 March 2010. This work was supported by NASA at Caltech (under grant NNX08AI11G and through UC Berkeley under contract NAS5-03131), JPL, GSFC, and APL.
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