  Small 3He-rich solar energetic particle (SEP) events with their anomalous
abundances, markedly different from solar system, provide evidence for a unique
acceleration mechanism that operates routinely near solar active regions.
Although the events are sometimes accompanied by coronal mass ejections (CMEs)
it is believed that mass and isotopic fractionation is produced directly in the
flare sites on the Sun. We report on a large-scale extreme ultraviolet (EUV)
coronal wave observed in association with 3He-rich SEP events. In the two
examples discussed, the observed waves were triggered by minor flares and
appeared concurrently with EUV jets and type III radio bursts but without CMEs.
The energy spectra from one event are consistent with so-called class-1
(characterized by power laws) while the other with class-2 (characterized by
rounded 3He and Fe spectra) 3He-rich SEP events, suggesting different
acceleration mechanisms in the two. The observation of EUV waves suggests that
large-scale disturbances, in addition to more commonly associated jets, may be
responsible for the production of 3He-rich SEP events.
