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Fig. 2


Proton intensity time profiles, in units s−1 cm−2 sr−1 MeV−1, for different proton energy ranges at various spacecraft. The green vertical lines mark the onset times of the first arriving particles while the grey vertical lines mark the possible onsets of ESP events. SOHO/ERNE has two large data gaps but is located close to GOES, allowing cross-comparison of the data. The 17th of May is DOY 138.

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