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- Low energy electrons: 1-100 keV
- Ions: 0.01-1 MeV/nucleon
- >104 events per year near solar maximum
- large e/p ratios
- enhanced abundances of 3He and of heavy ions
- high charge states
- enhanced alpha/proton ratio
- extend over 30° in solar longitude
- associated with type III bursts
- many clearly come from flares/microflares, but often not even a microflare or soft X-ray burst is observed.
Expected number of events
(To be verified for current sensitivity of STEP & update the table for current mission phases definitions. Also per orbit.)
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