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Solar sources of suprathermal (<1 MeV/nucleon) 3He-rich solar energeticparticles (SEPs) have been commonly associated with jets originating in small,compact active regions at the periphery of near-equatorial coronal holes.Sources of relatively rare, high-energy (>10 MeV/nucleon) 3He-rich SEPs remainunexplored. Here we present two of the most intense 3He-rich (3He/4He>1) SEPevents of the current solar cycle 24 measured on the Advanced CompositionExplorer at energy >10 MeV/nucleon. Although 3He shows high intensities, Z>2ions are below the detection threshold. The events are accompanied by type-IIIradio bursts, but no type-II emission as typically seen for suprathermal3He-rich SEPs. The corresponding solar sources were analyzed usinghigh-resolution, extreme-ultraviolet imaging and photospheric magnetic fieldobservations on the Solar Dynamics Observatory. We find the sources of theseevents associated with jets originating at the boundary of large sunspots withcomplex beta-gamma-delta magnetic configuration. Thus, details of theunderlying photospheric field apparently are important to produce 3He to highenergies in the examined events.

3He-Rich Solar Energetic Particles from Sunspot Jets